Module-level Variables

blanket_library

Variable nameTypeInitialDescription
volshldirealNone

Volume of inboard and outboard shield (m3)

volshldorealNone

Volume of inboard and outboard shield (m3)

volvvirealNone

Volume of inboard and outboard Vacuum Vessel (m3)

volvvorealNone

Volume of inboard and outboard Vacuum Vessel (m3)

hcryopfrealNone

Clearance between uppermost PF coil and cryostat lid (m)

vfblktirealNone

Inboard/outboard void fraction of blanket

vfblktorealNone

Inboard/outboard void fraction of blanket

bldeptirealNone

Inboard/outboard blanket coolant channel length (radial direction) (m)

bldeptorealNone

Inboard/outboard blanket coolant channel length (radial direction) (m)

blwidtirealNone

Inboard/outboard blanket mid-plan toroidal circumference for segment (m)

blwidtorealNone

Inboard/outboard blanket mid-plan toroidal circumference for segment (m)

bllengirealNone

Inboard/outboard blanket segment poloidal length (m)

bllengorealNone

Inboard/outboard blanket segment poloidal length (m)

bzfllengirealNone

Inboard/outboard primary blanket flow lengths (m)

bzfllengorealNone

Inboard/outboard primary blanket flow lengths (m)

bzfllengi_liqrealNone

Inboard/outboard secondary blanket flow lengths (m)

bzfllengo_liqrealNone

Inboard/outboard secondary blanket flow lengths (m)

pnucfwirealNone

Inboard/outboard first wall nuclear heating (MW)

pnucfworealNone

Inboard/outboard first wall nuclear heating (MW)

tpeakfwirealNone

Inboard/outboard first wall peak temperature (K)

tpeakfworealNone

Inboard/outboard first wall peak temperature (K)

mffwirealNone

Inboard/outboard total mass flow rate to remove inboard FW power (kg/s)

mffworealNone

Inboard/outboard total mass flow rate to remove inboard FW power (kg/s)

mffwrealNone

Inboard/outboard total mass flow rate to remove inboard FW power (kg/s)

npfwirealNone

Inboard/utboard total number of pipes

npfworealNone

Inboard/utboard total number of pipes

mffwpirealNone

Inboard/outboard mass flow rate per coolant pipe (kg/s)

mffwporealNone

Inboard/outboard mass flow rate per coolant pipe (kg/s)

pnucblktirealNone

Neutron power deposited inboard/outboard blanket blanket (MW)

pnucblktorealNone

Neutron power deposited inboard/outboard blanket blanket (MW)

mfblktirealNone

Inboard/outboard blanket mass flow rate for coolant (kg/s)

mfblktorealNone

Inboard/outboard blanket mass flow rate for coolant (kg/s)

mfblktrealNone

Inboard/outboard blanket mass flow rate for coolant (kg/s)

mfblkti_liqrealNone

Inboard/outboard blanket mass flow rate for liquid breeder (kg/s)

mfblkto_liqrealNone

Inboard/outboard blanket mass flow rate for liquid breeder (kg/s)

mfblkt_liqrealNone

Inboard/outboard blanket mass flow rate for liquid breeder (kg/s)

mftotalrealNone

Total mass flow rate for coolant (kg/s)

npblktirealNone

Inboard/outboard total num of pipes

npblktorealNone

Inboard/outboard total num of pipes

mfblktpirealNone

Inboard/outboard mass flow rate per coolant pipe (kg/s)

mfblktporealNone

Inboard/outboard mass flow rate per coolant pipe (kg/s)

velblktirealNone

Inboard/outboard coolant velocity in blanket (m/s)

velblktorealNone

Inboard/outboard coolant velocity in blanket (m/s)

htpmw_fwirealNone

Inboard/outboard first wall pumping power (MW)

htpmw_fworealNone

Inboard/outboard first wall pumping power (MW)

htpmw_blktirealNone

Inboard/outboard blanket pumping power (MW)

htpmw_blktorealNone

Inboard/outboard blanket pumping power (MW)

htpmw_fw_blktirealNone

Inboard/outboard fw and blanket pumping power (MW)

htpmw_fw_blktorealNone

Inboard/outboard fw and blanket pumping power (MW)

hblnktrealNone

Blanket internal half-height (m)

hshldrealNone

Shield internal half-height (m)

hvvrealNone

Vacuum vessel internal half-height (m)

icomponentintegerNone

Switch used to specify selected component: blanket=0, shield=1, vacuum vessel=2

physics_module

Variable nameTypeInitialDescription
isczintegerNone
err242integerNone
err243integerNone
rad_fraction_LCFSrealNone
total_plasma_internal_energyrealNone
total_loss_powerrealNone
total_energy_conf_timerealNone
ptarmwrealNone
lambdaiorealNone
drseprealNone
fiorealNone
fLIrealNone
fLOrealNone
fUIrealNone
fUOrealNone
pLImwrealNone
pLOmwrealNone
pUImwrealNone
pUOmwrealNone
rho_starrealNone
nu_starrealNone
beta_mcdonaldrealNone
itart_rrealNone
first_callintegerNone

pfcoil_variables

Variable nameTypeInitialDescription
ngrpmxinteger10

maximum number of groups of PF coils

nclsmxinteger2

maximum number of PF coils in a given group

nptsmxinteger32

maximum number of points across the midplane of the plasma at which the field from the PF coils is fixed

nfixmxinteger64

maximum number of fixed current PF coils

ngcintegerngrpmx*nclsmx

maximum total number of coils across all groups

ngc2integerngc+2

new variable to include 2 additional circuits: plasma and central solenoid

alfapfrealNone

smoothing parameter used in PF coil current calculation at the beginning of pulse (BoP)

alstrohrealNone

allowable hoop stress in Central Solenoid structural material (Pa)

i_cs_stressintegerNone

Switch for CS stress calculation:

  • =0 Hoop stress only
  • =1 Hoop + Axial stress
areaohrealNone

Central solenoid vertical cross-sectional area (m2)

a_oh_turnrealNone

Central solenoid (OH) trun cross-sectional area (m2)

awpohrealNone

central solenoid conductor+void area with area of steel subtracted (m2)

bmaxohrealNone

maximum field in central solenoid at end of flat-top (EoF) (T)

bmaxoh0realNone

maximum field in central solenoid at beginning of pulse (T)

bpfrealNone

peak field at coil i (T)

ccl0_marealNone

PF group current array, flux-swing cancellation current (MA) Input if i_pf_current=0, computed otherwise

ccls_marealNone

PF group current array, equilibrium current (MA) Input if i_pf_current=0, computed otherwise

cohboprealNone

Central solenoid overall current density at beginning of pulse (A/m2)

coheofrealNone

Central solenoid overall current density at end of flat-top (A/m2) (iteration variable 37) (sweep variable 62)

cptrealNone

current per turn in coil i at time j (A)

cptdinrealNone

peak current per turn input for PF coil i (A)

curpfbrealNone

PF coil current array, at beginning of pulse (MA) Indexed by coil number, not group number

curpffrealNone

PF coil current array, at flat top (MA) Indexed by coil number, not group number

curpfsrealNone

PF coil current array, at end of pulse (MA) Indexed by coil number, not group number

etapsurealNone

Efficiency of transfer of PF stored energy into or out of storage.

fcohbofrealNone

ratio of central solenoid overall current density at beginning of flat-top / end of flat-top

fcohboprealNone

ratio of central solenoid overall current density at beginning of pulse / end of flat-top (iteration variable 41)

fcuohsurealNone

copper fraction of strand in central solenoid

fcupfsurealNone

copper fraction of cable conductor (PF coils)

fvssurealNone

F-value for constraint equation 51

ipflocintegerNone

Switch for location of PF coil group i:

  • =1 PF coil on top of central solenoid (flux ramp only)
  • =2 PF coil on top of TF coil (flux ramp only)
  • =3 PF coil outside of TF coil (equilibrium coil)
  • =4 PF coil, general location (equilibrium coil)
ipfresintegerNone

switch for PF & CS coil conductor type:

  • =0 superconducting PF coils
  • =1 resistive PF coils
itr_sumrealNone

total sum of I x turns x radius for all PF coils and CS (Am)

isumatohintegerNone

switch for superconductor material in central solenoid:

  • =1 ITER Nb3Sn critical surface model with standard ITER parameters
  • =2 Bi-2212 high temperature superconductor (range of validity T < 20K, adjusted field b < 104 T, B > 6 T)
  • =3 NbTi
  • =4 ITER Nb3Sn model with user-specified parameters
  • =5 WST Nb3Sn parameterisation
  • =6 REBCO HTS tape in CroCo strand
  • =7 Durham Ginzburg-Landau critical surface model for Nb-Ti
  • =8 Durham Ginzburg-Landau critical surface model for REBCO
  • =9 Hazelton experimental data + Zhai conceptual model for REBCO
isumatpfintegerNone

switch for superconductor material in PF coils:

  • =1 ITER Nb3Sn critical surface model with standard ITER parameters
  • =2 Bi-2212 high temperature superconductor (range of validity T < 20K, adjusted field b < 104 T, B > 6 T)
  • =3 NbTi
  • =4 ITER Nb3Sn model with user-specified parameters
  • =5 WST Nb3Sn parameterisation
  • =6 REBCO HTS tape in CroCo strand
  • =7 Durham Ginzburg-Landau critical surface model for Nb-Ti
  • =8 Durham Ginzburg-Landau critical surface model for REBCO
  • =9 Hazelton experimental data + Zhai conceptual model for REBCO
j_crit_str_csrealNone

superconductor strand critical current density under operating conditions in central solenoid (A/m2). Necessary for the cost calculation in $/kA m

j_crit_str_pfrealNone

superconductor strand critical current density under operating conditions in PF coils (A/m2). Necessary for the cost calculation in $/kA m

i_pf_currentintegerNone

Switch for controlling the current of the PF coils:

  • =0 Input via the variables curpfb, curpff, curpfs
  • =1 SVD targets zero field across midplane (flux swing coils) and the correct vertical field at the plasma center (equilibrium coils)
i_sup_pf_shapeintegerNone

Switch for the placement of Location 3 (outboard) PF coils when the TF coils are superconducting (i_tf_sup = 1)

  • =0 (Default) Outboard PF coils follow TF shape in an ellipsoidal winding surface
  • =1 Outboard PF coils all have same radius, cylindrical winding surface
jscoh_boprealNone

central solenoid superconductor critical current density (A/m2) at beginning-of-pulse

jscoh_eofrealNone

central solenoid superconductor critical current density (A/m2) at end-of-flattop

jcableoh_boprealNone

central solenoid cable critical current density (A/m2) at beginning-of-pulse

jcableoh_eofrealNone

central solenoid cable critical current density (A/m2) at end-of-flattop

ncirtintegerNone

number of PF circuits (including central solenoid and plasma)

nclsintegerNone

number of PF coils in group j

nfxfhintegerNone

number of filaments the top and bottom of the central solenoid should be broken into during scaling (5 - 10 is good)

ngrpintegerNone

number of groups of PF coils. Symmetric coil pairs should all be in the same group

nohcintegerNone

number of PF coils (excluding the central solenoid) + 1

ohhghfrealNone

Central solenoid height / TF coil internal height

oh_steel_fracrealNone

central solenoid steel fraction (iteration variable 122)

pf_current_safety_factorrealNone

Ratio of permissible PF coil conductor current density to critical conductor current density based on short-sample DC measurements

pfcasethrealNone

steel case thickness for PF coil i (m)

pfclresrealNone

PF coil resistivity (if ipfres=1) (Ohm-m)

rhopfbusrealNone

Resistivity of CS and PF coil bus bars (irrespective of whether the coils themselves are superconducting or resistive) (Ohm-m)

pfmmaxrealNone

mass of heaviest PF coil (tonnes)

pfrmaxrealNone

radius of largest PF coil (m)

pfwpmwrealNone

Total mean wall plug power dissipated in PFC and CS power supplies (MW) (issue #713)

powohresrealNone

central solenoid resistive power during flattop (W)

powpfresrealNone

total PF coil resistive losses during flattop (W)

rarealNone

inner radius of coil i (m)

rbrealNone

outer radius of coil i (m)

ricrealNone

peak current in coil i (MA-turns)

rjconpfrealNone

average winding pack current density of PF coil i (A/m2) at time of peak current in that coil (calculated for ipfloc=1 coils)

rjohcrealNone

allowable central solenoid current density at end of flat-top (A/m2)

rjohc0realNone

allowable central solenoid current density at beginning of pulse (A/m2)

rjpfalwrealNone

allowable winding pack current density of PF coil i (A/m2)

rohcrealNone

radius to the centre of the central solenoid (m)

routrrealNone

radial distance (m) from outboard TF coil leg to centre of ipfloc=3 PF coils

rpfrealNone

radius of PF coil i (m)

rpf1realNone

offset (m) of radial position of ipfloc=1 PF coils from being directly above the central solenoid

rpf2realNone

offset (m) of radial position of ipfloc=2 PF coils from being at rmajor (offset = rpf2triangrminor)

rrefrealNone

PF coil radial positioning adjuster:

  • for groups j with ipfloc(j) = 1; rref(j) is ignored
  • for groups j with ipfloc(j) = 2; rref(j) is ignored
  • for groups j with ipfloc(j) = 3; rref(j) is ignored
  • for groups j with ipfloc(j) = 4; rref(j) is radius of the coil in units of minor radii from the major radius (r = rmajor + rref*rminor)
s_tresca_ohrealNone

Maximum shear stress (Tresca criterion) coils/central solenoid [MPa]

sigpfcalwrealNone

maximum permissible tensile stress (MPa) in steel coil cases for superconducting PF coils (ipfres=0)

sigpfcfrealNone

fraction of JxB hoop force supported by steel case for superconducting PF coils (ipfres=0)

sxlgrealNone

mutual inductance matrix (H)

tmargohrealNone

Central solenoid temperature margin (K)

turnsrealNone

number of turns in PF coil i

vfrealNone

winding pack void fraction of PF coil i for coolant

vfohcrealNone

void fraction of central solenoid conductor for coolant

vsbnrealNone

total flux swing available for burn (Wb)

vsefbnrealNone

flux swing from PF coils for burn (Wb)

vsefsurealNone

flux swing from PF coils for startup (Wb)

vseftrealNone

total flux swing from PF coils (Wb)

vsohrealNone

total flux swing from the central solenoid (Wb)

vsohbnrealNone

central solenoid flux swing for burn (Wb)

vsohsurealNone

central solenoid flux swing for startup (Wb)

vssurealNone

total flux swing for startup (constraint eqn 51 to enforce vssu=vsres+vsind) (Wb)

vstotrealNone

total flux swing for pulse (Wb)

wavesrealNone

used in current waveform of PF coils/central solenoid

whtpfrealNone

total mass of the PF coil conductor (kg)

whtpfsrealNone

total mass of the PF coil structure (kg)

wtcrealNone

conductor mass for PF coil i (kg)

wtsrealNone

structure mass for PF coil i (kg)

zhrealNone

upper point of PF coil i (m)

zlrealNone

lower point of PF coil i (m)

zpfrealNone

z (height) location of PF coil i (m)

zrefrealNone

PF coil vertical positioning adjuster:

  • for groups j with ipfloc(j) = 1; zref(j) is ignored
  • for groups j with ipfloc(j) = 2 AND itart=1 (only); zref(j) is distance of centre of PF coil from inside edge of TF coil (remember that PF coils for STs lie within the TF coil)
  • for groups j with ipfloc(j) = 3; zref(j) = ratio of height of coil group j to plasma minor radius
  • for groups j with ipfloc(j) = 4; zref(j) = ratio of height of coil group j to plasma minor radius
  • bmaxcs_limrealNone

    Central solenoid max field limit [T]

    fbmaxcsrealNone

    F-value for CS mmax field (cons. 79, itvar 149)

    ld_ratio_cstrealNone

    Ratio of CS coil turn conduit length to depth

    l_cond_cstrealNone

    Length of CS of CS coil turn conduit

    d_cond_cstrealNone

    Depth/width of CS of CS coil turn conduit

    r_out_cstrealNone

    Length of CS of CS coil turn conduit length

    r_in_cstrealNone

    Length of CS of CS coil turn conduit length

    global_variables

    Variable nameTypeInitialDescription
    icasecharacterNone

    power plant type

    runtitlecharacterNone

    short descriptive title for the run

    verboseintegerNone

    switch for turning on/off diagnostic messages

    • =0 turn off diagnostics
    • =1 turn on diagnostics
    run_testsintegerNone

    turns on built-in tests if set to 1

    maxcalintegerNone

    maximum number of VMCON iterations

    fileprefixcharacterNone

    input file prefix

    output_prefixcharacterNone

    output file prefix

    xlabelcharacterNone

    scan parameter description label

    vlabelcharacterNone

    scan value name label

    xlabel_2characterNone

    scan parameter description label (2nd dimension)

    vlabel_2characterNone

    scan value name label (2nd dimension)

    iscan_globalintegerNone

    Makes iscan available globally.

    convergence_parameterrealNone

    VMCON convergence parameter "sum"

    build_variables

    Variable nameTypeInitialDescription
    aplasminrealNone

    minimum minor radius (m)

    available_radial_spacerealNone

    Minimal radial space between plasma and coils (m)

    blarearealNone

    blanket total surface area (m2)

    blareaibrealNone

    inboard blanket surface area (m2)

    blareaobrealNone

    outboard blanket surface area (m2)

    blbmithrealNone

    inboard blanket box manifold thickness (m) (blktmodel>0)

    blbmothrealNone

    outboard blanket box manifold thickness (m) (blktmodel>0)

    blbpithrealNone

    inboard blanket base plate thickness (m) (blktmodel>0)

    blbpothrealNone

    outboard blanket base plate thickness (m) (blktmodel>0)

    blbuithrealNone

    inboard blanket breeding zone thickness (m) (blktmodel>0) (iteration variable 90)

    blbuothrealNone

    outboard blanket breeding zone thickness (m) (blktmodel>0) (iteration variable 91)

    blnkithrealNone

    inboard blanket thickness (m); (calculated if blktmodel>0) (=0.0 if iblnkith=0)

    blnkothrealNone

    outboard blanket thickness (m); calculated if blktmodel>0

    blnktthrealNone

    top blanket thickness (m), = mean of inboard and outboard blanket thicknesses

    borerealNone

    central solenoid inboard radius (m) (iteration variable 29)

    clhsfrealNone

    cryostat lid height scaling factor (tokamaks)

    ddwexrealNone

    cryostat thickness (m)

    d_vv_inrealNone

    vacuum vessel inboard thickness (TF coil / shield) (m)

    d_vv_outrealNone

    vacuum vessel outboard thickness (TF coil / shield) (m)

    d_vv_toprealNone

    vacuum vessel topside thickness (TF coil / shield) (m) (= d_vv_bot if double-null)

    d_vv_botrealNone

    vacuum vessel underside thickness (TF coil / shield) (m)

    f_avspacerealNone

    F-value for stellarator radial space check (constraint equation 83)

    fcspcrealNone

    Fraction of space occupied by CS pre-compression structure

    fseppcrealNone

    Separation force in CS coil pre-compression structure

    fwarearealNone

    first wall total surface area (m2)

    fwareaibrealNone

    inboard first wall surface area (m2)

    fwareaobrealNone

    outboard first wall surface area (m2)

    fwithrealNone

    inboard first wall thickness, initial estimate as calculated (m)

    fwothrealNone

    outboard first wall thickness, initial estimate as calculated (m)

    gapdsrealNone

    gap between inboard vacuum vessel and thermal shield (m) (iteration variable 61)

    gapohrealNone

    gap between central solenoid and TF coil (m) (iteration variable 42)

    gapominrealNone

    minimum gap between outboard vacuum vessel and TF coil (m) (iteration variable 31)

    gapstorealNone

    gap between outboard vacuum vessel and TF coil (m)

    hmaxrealNone

    maximum (half-)height of TF coil (inside edge) (m)

    hpfdifrealNone

    difference in distance from midplane of upper and lower portions of TF legs (non-zero for single-null devices) (m)

    hpfurealNone

    height to top of (upper) TF coil leg (m)

    hr1realNone

    half-height of TF coil inboard leg straight section (m)

    iohclintegerNone

    Switch for existence of central solenoid:

    • =0 central solenoid not present
    • =1 central solenoid exists
    iprecompintegerNone

    Switch for existence of central solenoid pre-compression structure:

    • =0 no pre-compression structure
    • =1 calculated pre-compression structure
    tf_in_csintegerNone

    Switch for placing the TF coil inside the CS

    • = 0 TF coil is outside the CS (default)
    • = 1 TF coil is inside the CS
    ohcthrealNone

    Central solenoid thickness (m) (iteration variable 16)

    precomprealNone

    CS coil precompression structure thickness (m)

    rbldrealNone

    sum of thicknesses to the major radius (m)

    required_radial_spacerealNone

    Required space between coil and plasma for blanket shield wall etc (m)

    rinboardrealNone

    plasma inboard radius (m) (consistency equation 29)

    rsldirealNone

    radius to inboard shield (inside point) (m)

    rsldorealNone

    radius to outboard shield (outside point) (m)

    r_vv_inboard_outrealNone

    Radial plasma facing side position of inboard vacuum vessel [m]

    r_sh_inboard_inrealNone

    Radial inner side position of inboard neutronic shield [m]

    r_sh_inboard_outrealNone

    Radial plasma facing side position of inboard neutronic shield [m]

    r_tf_inboard_inrealNone

    Mid-plane inboard TF coil leg radius at the centre-machine side [m]

    r_tf_inboard_midrealNone

    Mid-plane inboard TF coil leg radius at middle of the coil [m]

    r_tf_inboard_outrealNone

    Mid-plane inboard TF coil leg radius at the plasma side [m]

    r_tf_outboard_midrealNone

    Mid-plane outboard TF coil leg radius at the middle of the coil [m]

    i_r_cp_topintegerNone

    Switch selecting the he parametrization of the outer radius of the top of the CP part of the TF coil 0 : r_cp_top is set by the plasma shape 1 : r_cp_top is a user input 2 : r_cp_top is set using the CP top and midplane CP radius ratio

    r_cp_toprealNone

    Top outer radius of the centropost (ST only) (m)

    f_r_cprealNone

    Ratio between the top and the midplane TF CP outer radius [-] Not used by default (-1) must be larger than 1 otherwise

    dr_tf_inner_borerealNone

    TF coil horizontal inner bore (m)

    dh_tf_inner_borerealNone

    TF coil vertical inner bore (m)

    scraplirealNone

    Gap between plasma and first wall, inboard side (m) (if iscrp=1) Iteration variable: ixc = 73 Scan variable: nsweep = 58

    scraplorealNone

    Gap between plasma and first wall, outboard side (m) (if iscrp=1) Iteration variable: ixc = 74 Scan variable: nsweep = 59

    sharearealNone

    shield total surface area (m2)

    shareaibrealNone

    inboard shield surface area (m2)

    shareaobrealNone

    outboard shield surface area (m2)

    shldithrealNone

    inboard shield thickness (m) (iteration variable 93)

    shldlthrealNone

    lower (under divertor) shield thickness (m)

    shldothrealNone

    outboard shield thickness (m) (iteration variable 94)

    shldtthrealNone

    upper/lower shield thickness (m); calculated if blktmodel > 0 (= shldlth if double-null)

    sigallpcrealNone

    allowable stress in CSpre-compression structure (Pa)

    tfcthrealNone

    inboard TF coil thickness, (centrepost for ST) (m) (input, calculated or iteration variable 13)

    tfoffsetrealNone

    vertical distance between centre of TF coils and centre of plasma (m)

    tfootfirealNone

    TF coil outboard leg / inboard leg radial thickness ratio (i_tf_sup=0 only) (iteration variable 75)

    tfthkorealNone

    Outboard TF coil thickness (m)

    tftsgaprealNone

    Minimum metal-to-metal gap between TF coil and thermal shield (m)

    thshield_ibrealNone

    TF-VV thermal shield thickness, inboard (m)

    thshield_obrealNone

    TF-VV thermal shield thickness, outboard (m)

    thshield_vbrealNone

    TF-VV thermal shield thickness, vertical build (m)

    vgap_vv_thermalshieldrealNone

    vertical gap between vacuum vessel and thermal shields (m)

    vgap_xpoint_divertorrealNone

    vertical gap between x-point and divertor (m) (if = 0, it is calculated)

    vgaptoprealNone

    vertical gap between top of plasma and first wall (m) (= vgap_xpoint_divertor if double-null)

    vvblgaprealNone

    gap between vacuum vessel and blanket (m)

    pllenirealNone

    length of inboard divertor plate (m)

    pllenorealNone

    length of outboard divertor plate (m)

    plsepirealNone

    poloidal length, x-point to inboard strike point (m)

    plseporealNone

    poloidal length, x-point to outboard strike point (m)

    rsporealNone

    outboard strike point radius (m)

    heat_transport_variables

    Variable nameTypeInitialDescription
    baseelrealNone

    base plant electric load (W)

    crypmwrealNone

    cryogenic plant power (MW)

    crypmw_maxrealNone

    Maximum cryogenic plant power (MW) Constraint equation icc = 87 Scan variable nwseep = 56

    f_crypmwrealNone

    f-value for maximum cryogenic plant power Iteration variable ixc = 164 Constraint equation icc = 87

    etatfrealNone

    AC to resistive power conversion for TF coils

    etathrealNone

    thermal to electric conversion efficiency if secondary_cycle=2; otherwise calculated.

    etath_liqrealNone
    fachtmwrealNone

    facility heat removal (MW)

    fcshtrealNone

    total baseline power required at all times (MW)

    fgrosboprealNone

    scaled fraction of gross power to balance-of-plant

    fmgdmwrealNone

    power to mgf (motor-generator flywheel) units (MW) (ignored if iscenr=2)

    fpumpblktrealNone

    fraction of total blanket thermal power required to drive the blanket coolant pumps (default assumes water coolant) (secondary_cycle=0)

    fpumpdivrealNone

    fraction of total divertor thermal power required to drive the divertor coolant pumps (default assumes water coolant)

    fpumpfwrealNone

    fraction of total first wall thermal power required to drive the FW coolant pumps (default assumes water coolant) (secondary_cycle=0)

    fpumpshldrealNone

    fraction of total shield thermal power required to drive the shield coolant pumps (default assumes water coolant)

    htpmw_minrealNone

    Minimum total electrical power for primary coolant pumps (MW) (NOT RECOMMENDED)

    helpowrealNone

    Heat removal at cryogenic temperature tmpcry (W)

    helpow_cryalrealNone

    Heat removal at cryogenic temperature tcoolin (W)

    htpmwrealNone

    heat transport system electrical pump power (MW)

    htpmw_blktrealNone

    blanket primary coolant mechanical pumping power (MW)

    htpmw_blkt_liqrealNone

    blanket secondary coolant mechanical pumping power (MW)

    htpmw_blkt_totrealNone

    blanket primary + secondary coolant mechanical pumping power (MW)

    htpmw_divrealNone

    divertor coolant mechanical pumping power (MW)

    htpmw_fwrealNone

    first wall coolant mechanical pumping power (MW)

    htpmw_shldrealNone

    shield and vacuum vessel coolant mechanical pumping power (MW)

    htpsecmwrealNone

    Waste power lost from primary coolant pumps (MW)

    ipowerflowintegerNone

    switch for power flow model:

    • =0 pre-2014 version
    • =1 comprehensive 2014 model
    iprimshldintegerNone

    Switch for shield thermal power destiny:

    • =0 does not contribute to energy generation cycle
    • =1 contributes to energy generation cycle
    nphxintegerNone

    number of primary heat exchangers

    pacpmwrealNone

    total pulsed power system load (MW)

    peakmvarealNone

    peak MVA requirement

    pfwdivrealNone

    heat removal from first wall/divertor (MW)

    pgrossmwrealNone

    gross electric power (MW)

    pinjhtrealNone

    power dissipated in heating and current drive system (MW)

    pinjmaxrealNone

    maximum injector power during pulse (heating and ramp-up/down phase) (MW)

    pinjwprealNone

    injector wall plug power (MW)

    pinjwpfixrealNone

    secondary injector wall plug power (MW)

    pnetelmwrealNone

    net electric power (MW)

    precircmwrealNone

    recirculating electric power (MW)

    priheatrealNone

    total thermal power removed from fusion core (MW)

    psecdivrealNone

    Low-grade heat lost in divertor (MW)

    psechcdrealNone

    Low-grade heat lost into HCD apparatus (MW)

    psechtmwrealNone

    Low-grade heat (MW)

    pseclossmwrealNone

    Low-grade heat (VV + lost)(MW)

    psecshldrealNone

    Low-grade heat deposited in shield (MW)

    pthermmwrealNone

    High-grade heat useful for electric production (MW)

    pwpm2realNone

    base AC power requirement per unit floor area (W/m2)

    tfacpdrealNone

    total steady state TF coil AC power demand (MW)

    tlvpmwrealNone

    estimate of total low voltage power (MW)

    trithtmwrealNone

    power required for tritium processing (MW)

    tturbrealNone

    coolant temperature at turbine inlet (K) (secondary_cycle = 3,4)

    vachtmwrealNone

    vacuum pump power (MW)

    vacuum_variables

    Variable nameTypeInitialDescription
    vacuum_modelcharacterNone

    switch for vacuum pumping model:

    • ='old' for old detailed ETR model
    • ='simple' for simple steady-state model with comparison to ITER cryopumps
    niterpumprealNone

    number of high vacuum pumps (real number), each with the throughput of one ITER cryopump (50 Pa m3 s-1), all operating at the same time (vacuum_model='simple')

    ntypeintegerNone

    switch for vacuum pump type:

    • =0 - for turbomolecular pump (magnetic bearing) with speed of 2.0 m3/s (1.95 for N2, 1.8 for He, 1.8 for DT)
    • =1 - for compound cryopump with nominal speed of 10.0 m3/s (9.0 for N2, 5.0 for He and 25.0 for DT)
    nvductintegerNone

    number of ducts (torus to pumps)

    dlscalrealNone

    vacuum system duct length scaling

    pbaserealNone

    base pressure during dwell before gas pre-fill(Pa)

    prdivrealNone

    divertor chamber pressure during burn (Pa)

    pumptprealNone

    Pump throughput (molecules/s) (default is ITER value)

    ratrealNone

    plasma chamber wall outgassing rate (Pa-m/s)

    tnrealNone

    neutral gas temperature in chamber (K)

    vacdshmrealNone

    mass of vacuum duct shield (kg)

    vcdimaxrealNone

    diameter of duct passage (m)

    vpumpnintegerNone

    number of high vacuum pumps

    dwell_pumpintegerNone

    switch for dwell pumping options:

    • =0 pumping only during tdwell
    • =1 pumping only during tramp
    • =2 pumping during tdwell + tramp
    pumpareafractionrealNone

    area of one pumping port as a fraction of plasma surface area

    pumpspeedmaxrealNone

    maximum pumping speed per unit area for deuterium & tritium, molecular flow

    pumpspeedfactorrealNone

    effective pumping speed reduction factor due to duct impedance

    initialpressurerealNone

    initial neutral pressure at the beginning of the dwell phase (Pa)

    outgasindexrealNone

    outgassing decay index

    outgasfactorrealNone

    outgassing prefactor kw: outgassing rate at 1 s per unit area (Pa m s-1)

    dcll_module

    Variable nameTypeInitialDescription
    r_fcirealNone

    Radial BZ thickness [m]

    r_backwallrealNone

    Radial BZ thickness [m]

    bz_r_ibrealNone

    Structure/coolant compositional fractions

    bz_r_obrealNone

    Structure/coolant compositional fractions

    f_vol_stff_platesrealNone

    MF/BSS compositional fractions

    f_vol_stl_bz_structrealNone

    MF/BSS compositional fractions

    f_vol_stl_back_wallrealNone

    MF/BSS compositional fractions

    f_vol_stl_fwrealNone

    MF/BSS compositional fractions

    f_vol_mfbss_stlrealNone

    Volume of FCIs, other BZ structure, liquid channels, backwall and MF/BSS [m^3]

    f_vol_mfbss_herealNone

    Volume of FCIs, other BZ structure, liquid channels, backwall and MF/BSS [m^3]

    f_vol_mfbss_pblirealNone

    Volume of FCIs, other BZ structure, liquid channels, backwall and MF/BSS [m^3]

    vol_fcirealNone

    BZ masses by composition [kg]

    vol_bz_structrealNone

    BZ masses by composition [kg]

    vol_bz_liqrealNone

    BZ masses by composition [kg]

    vol_bz_liq_ibrealNone

    BZ masses by composition [kg]

    vol_bz_liq_obrealNone

    BZ masses by composition [kg]

    vol_bwrealNone

    BZ masses by composition [kg]

    vol_bssrealNone

    BZ masses by composition [kg]

    wht_cerrealNone

    Backwall masses by composition [kg]

    wht_stl_structrealNone

    Backwall masses by composition [kg]

    wht_cool_structrealNone

    Backwall masses by composition [kg]

    wht_bw_stlrealNone

    MF/BSS masses by composition [kg]

    wht_bw_coolrealNone

    MF/BSS masses by composition [kg]

    wht_mfbss_stlrealNone

    FW masses by composition [kg]

    wht_mfbss_coolrealNone

    FW masses by composition [kg]

    wht_mfbss_pblirealNone

    FW masses by composition [kg]

    fwmass_stlrealNone

    Total masses of material in blanket [kg]

    fwmass_coolrealNone

    Total masses of material in blanket [kg]

    mass_cool_blanketrealNone

    Total mass for an inboard/outboard reactor segment [kg]

    mass_liq_blanketrealNone

    Total mass for an inboard/outboard reactor segment [kg]

    mass_stl_blanketrealNone

    Total mass for an inboard/outboard reactor segment [kg]

    mass_segm_ibrealNone
    mass_segm_obrealNone

    sctfcoil_module

    Variable nameTypeInitialDescription
    tf_fit_trealNone

    Dimensionless winding pack width

    tf_fit_zrealNone

    Dimensionless winding pack radial thickness

    tf_fit_yrealNone

    Ratio of peak field with ripple to nominal axisymmetric peak field

    tfc_currentrealNone

    Current in each TF coil

    awpcrealNone

    Total cross-sectional area of winding pack including GW insulation and insertion gap [m2]

    awptfrealNone

    Total cross-sectional area of winding pack without ground insulation and insertion gap [m2]

    a_tf_steelrealNone

    Inboard coil steel coil cross-sectional area [m2]

    a_tf_insrealNone

    Inboard coil insulation cross-section per coil [m2]

    f_tf_steelrealNone

    Inboard coil steel fraction [-]

    f_tf_insrealNone

    Inboard coil insulation fraction [-]

    h_cp_toprealNone

    Vertical distance from the midplane to the top of the tapered section [m]

    r_tf_outboard_inrealNone

    Radial position of plasma-facing edge of TF coil outboard leg [m]

    r_tf_outboard_outrealNone

    Radial position of outer edge of TF coil inboard leg [m]

    r_wp_innerrealNone

    Radial position of inner edge and centre of winding pack [m]

    r_wp_outerrealNone

    Radial position of outer edge and centre of winding pack [m]

    r_wp_centrerealNone

    Radial position of centre and centre of winding pack [m]

    dr_tf_wp_toprealNone

    Conductor layer radial thickness at centercollumn top [m] Ground insulation layer included, only defined for itart = 1

    vol_ins_cprealNone

    CP turn insulation volume [m3]

    vol_gr_ins_cprealNone

    CP ground insulation volume [m3]

    vol_case_cprealNone

    Volume of the CP outer casing cylinder

    t_wp_toroidalrealNone

    Minimal toroidal thickness of of winding pack [m]

    t_wp_toroidal_avrealNone

    Averaged toroidal thickness of of winding pack [m]

    t_lat_case_avrealNone

    Average lateral casing thickness [m]

    a_case_frontrealNone

    Front casing area [m2]

    a_case_noserealNone

    Nose casing area [m2]

    a_ground_insrealNone

    Inboard mid-plane cross-section area of the WP ground insulation [m2]

    a_leg_insrealNone

    TF ouboard leg turn insulation area per coil [m2]

    a_leg_gr_insrealNone

    TF outboard leg ground insulation area per coil [m2]

    a_leg_condrealNone

    Exact TF ouboard leg conductor area [m2]

    theta_coilrealNone

    Half toroidal angular extent of a single TF coil inboard leg

    tan_theta_coilrealNone

    Tan half toroidal angular extent of a single TF coil inboard leg

    t_conductor_radialrealNone

    Conductor area radial and toroidal dimension (integer turn only) [m]

    t_conductor_toroidalrealNone

    Conductor area radial and toroidal dimension (integer turn only) [m]

    t_cable_radialrealNone

    Cable area radial and toroidal dimension (integer turn only) [m]

    t_cable_toroidalrealNone

    Cable area radial and toroidal dimension (integer turn only) [m]

    t_turn_radialrealNone

    Turn radial and toroidal dimension (integer turn only) [m]

    t_turn_toroidalrealNone

    Turn radial and toroidal dimension (integer turn only) [m]

    t_cablerealNone

    Cable area averaged dimension (square shape) [m]

    vforce_inboard_totrealNone

    Total inboard vertical tension (all coils) [N]

    vv_stress_quenchrealNone

    The Tresca stress experienced by the Vacuum Vessel when the SCTF coil quenches [Pa]

    coppertypeNone
    hastelloytypeNone
    soldertypeNone
    jackettypeNone
    heliumtypeNone
    croco_strand_arearealNone
    croco_strand_critical_currentrealNone
    conductor_copper_arearealNone
    conductor_copper_fractionrealNone
    conductor_copper_bar_arearealNone
    conductor_hastelloy_arearealNone
    conductor_hastelloy_fractionrealNone
    conductor_helium_arearealNone
    conductor_helium_fractionrealNone
    conductor_solder_arearealNone
    conductor_solder_fractionrealNone
    conductor_jacket_arearealNone
    conductor_jacket_fractionrealNone
    conductor_rebco_arearealNone
    conductor_rebco_fractionrealNone
    conductor_critical_currentrealNone
    conductor_acsrealNone
    conductor_arearealNone

    Area of cable space inside jacket

    T1realNone
    time2realNone
    tau2realNone
    estotftrealNone
    is_leg_cp_temp_sameintegerNone

    stellarator_module

    Variable nameTypeInitialDescription
    f_nrealNone
    f_rrealNone
    f_aspectrealNone
    f_brealNone
    f_irealNone
    f_arealNone
    first_calllogical.true.
    first_call_stfwbslogical.true.

    buildings_variables

    Variable nameTypeInitialDescription
    admvrealNone

    administration building volume (m3)

    admvolrealNone

    volume of administration buildings (m3)

    aux_build_lrealNone

    aux building supporting tokamak processes length, width, height (m)

    aux_build_wrealNone

    aux building supporting tokamak processes length, width, height (m)

    aux_build_hrealNone

    aux building supporting tokamak processes length, width, height (m)

    auxcool_lrealNone

    Site-Wide Auxiliary Cooling Water facility length, width, height (m)

    auxcool_wrealNone

    Site-Wide Auxiliary Cooling Water facility length, width, height (m)

    auxcool_hrealNone

    Site-Wide Auxiliary Cooling Water facility length, width, height (m)

    bioshld_thkrealNone

    Radial thickness of bio-shield around reactor (m)

    chemlab_lrealNone

    Chemistry labs and treatment buldings length, width, height (m)

    chemlab_wrealNone

    Chemistry labs and treatment buldings length, width, height (m)

    chemlab_hrealNone

    Chemistry labs and treatment buldings length, width, height (m)

    clh1realNone

    vertical clearance from TF coil to cryostat (m) (calculated for tokamaks)

    clh2realNone

    clearance beneath TF coil to foundation (including basement) (m)

    control_buildings_lrealNone

    control building length, width, height (m)

    control_buildings_wrealNone

    control building length, width, height (m)

    control_buildings_hrealNone

    control building length, width, height (m)

    convrealNone

    control building volume (m3)

    convolrealNone

    volume of control, protection and i&c building (m3)

    crane_arm_hrealNone

    vertical dimension of crane arm, operating over reactor (m)

    crane_clrnc_hrealNone

    horizontal clearance to building wall for crane operation (m)

    crane_clrnc_vrealNone

    vertical clearance for crane operation (m)

    cryomag_lrealNone

    Cryogenic Buildings for Magnet and Fuel Cycle length, width, height (m)

    cryomag_wrealNone

    Cryogenic Buildings for Magnet and Fuel Cycle length, width, height (m)

    cryomag_hrealNone

    Cryogenic Buildings for Magnet and Fuel Cycle length, width, height (m)

    cryostore_lrealNone

    Magnet Cryo Storage Tanks length, width, height (m)

    cryostore_wrealNone

    Magnet Cryo Storage Tanks length, width, height (m)

    cryostore_hrealNone

    Magnet Cryo Storage Tanks length, width, height (m)

    cryostat_clrncrealNone

    vertical clearance from TF coil to cryostat (m)

    cryvolrealNone

    volume of cryoplant building (m3)

    efloorrealNone

    effective total floor space (m2)

    elecdist_lrealNone

    Transformers and electrical distribution facilities length, width, height (m)

    elecdist_wrealNone

    Transformers and electrical distribution facilities length, width, height (m)

    elecdist_hrealNone

    Transformers and electrical distribution facilities length, width, height (m)

    elecload_lrealNone

    Electric (eesential and non-essential) load centres length, width, height (m)

    elecload_wrealNone

    Electric (eesential and non-essential) load centres length, width, height (m)

    elecload_hrealNone

    Electric (eesential and non-essential) load centres length, width, height (m)

    elecstore_lrealNone

    Energy Storage facilities length, width, height (m)

    elecstore_wrealNone

    Energy Storage facilities length, width, height (m)

    elecstore_hrealNone

    Energy Storage facilities length, width, height (m)

    elevolrealNone

    volume of electrical equipment building (m3)

    esbldgm3realNone

    volume of energy storage equipment building (m3) (not used if lpulse=0)

    fc_building_lrealNone

    Fuel Cycle facilities length, width (m)

    fc_building_wrealNone

    Fuel Cycle facilities length, width (m)

    fndtrealNone

    foundation thickness (m)

    gas_buildings_lrealNone

    air & gas supply (amalgamated) buildings length, width, height (m)

    gas_buildings_wrealNone

    air & gas supply (amalgamated) buildings length, width, height (m)

    gas_buildings_hrealNone

    air & gas supply (amalgamated) buildings length, width, height (m)

    ground_clrncrealNone

    clearance beneath TF coil (m)

    hcd_building_lrealNone

    HCD building length, width, height (m)

    hcd_building_wrealNone

    HCD building length, width, height (m)

    hcd_building_hrealNone

    HCD building length, width, height (m)

    hcclrealNone

    clearance around components in hot cell (m)

    hcwtrealNone

    hot cell wall thickness (m)

    heat_sink_lrealNone

    heat sinks length, width, height (m)

    heat_sink_wrealNone

    heat sinks length, width, height (m)

    heat_sink_hrealNone

    heat sinks length, width, height (m)

    hot_sepdistrealNone

    hot cell storage component separation distance (m)

    hotcell_hrealNone

    hot cell storage and maintenance facility height (m)

    hw_storage_lrealNone

    hazardous waste storage building length, width, height (m)

    hw_storage_wrealNone

    hazardous waste storage building length, width, height (m)

    hw_storage_hrealNone

    hazardous waste storage building length, width, height (m)

    i_bldgs_sizeintegerNone

    switch between routines estimating building sizes (0 = default; 1 = updated)

    i_bldgs_vintegerNone

    switch to select verbose output for buildings (1 = verbose)

    ilw_smelter_lrealNone

    radioactive waste smelting facility length, width, height (m)

    ilw_smelter_wrealNone

    radioactive waste smelting facility length, width, height (m)

    ilw_smelter_hrealNone

    radioactive waste smelting facility length, width, height (m)

    ilw_storage_lrealNone

    ILW waste storage building length, width, height (m)

    ilw_storage_wrealNone

    ILW waste storage building length, width, height (m)

    ilw_storage_hrealNone

    ILW waste storage building length, width, height (m)

    llw_storage_lrealNone

    LLW waste storage building length, width, height (m)

    llw_storage_wrealNone

    LLW waste storage building length, width, height (m)

    llw_storage_hrealNone

    LLW waste storage building length, width, height (m)

    magnet_pulse_lrealNone

    pulsed magnet power building length, width, height (m)

    magnet_pulse_wrealNone

    pulsed magnet power building length, width, height (m)

    magnet_pulse_hrealNone

    pulsed magnet power building length, width, height (m)

    magnet_trains_lrealNone

    steady state magnet power trains building length, width, height (m)

    magnet_trains_wrealNone

    steady state magnet power trains building length, width, height (m)

    magnet_trains_hrealNone

    steady state magnet power trains building length, width, height (m)

    maint_cont_lrealNone

    maintenance control building length, width, height (m)

    maint_cont_wrealNone

    maintenance control building length, width, height (m)

    maint_cont_hrealNone

    maintenance control building length, width, height (m)

    mbvfacrealNone

    maintenance building volume multiplication factor

    nbi_sys_lrealNone

    NBI system length, width (m)

    nbi_sys_wrealNone

    NBI system length, width (m)

    pfbldgm3realNone

    volume of PF coil power supply building (m3)

    pibvrealNone

    power injection building volume (m3)

    qnty_sfty_facrealNone

    quantity safety factor for component use during plant lifetime

    rbvfacrealNone

    reactor building volume multiplication factor

    rbrtrealNone

    reactor building roof thickness (m)

    rbvolrealNone

    reactor building volume (m3)

    rbwtrealNone

    reactor building wall thickness (m)

    reactor_clrncrealNone

    clearance around reactor (m)

    reactor_fndtn_thkrealNone

    reactor building foundation thickness (m)

    reactor_hall_lrealNone

    reactor building length, width, height (m)

    reactor_hall_wrealNone

    reactor building length, width, height (m)

    reactor_hall_hrealNone

    reactor building length, width, height (m)

    reactor_roof_thkrealNone

    reactor building roof thickness (m)

    reactor_wall_thkrealNone

    reactor building wall thickness (m)

    rmbvolrealNone

    volume of maintenance and assembly building (m3)

    robotics_lrealNone

    robotics buildings length, width, height (m)

    robotics_wrealNone

    robotics buildings length, width, height (m)

    robotics_hrealNone

    robotics buildings length, width, height (m)

    rowrealNone

    clearance to building wall for crane operation (m)

    rxclrealNone

    clearance around reactor (m)

    sec_buildings_lrealNone

    security & safety buildings length, width, height (m)

    sec_buildings_wrealNone

    security & safety buildings length, width, height (m)

    sec_buildings_hrealNone

    security & safety buildings length, width, height (m)

    shmfrealNone

    fraction of shield mass per TF coil to be moved in the maximum shield lift

    shovrealNone

    shops and warehouse volume (m3)

    shovolrealNone

    volume of shops and buildings for plant auxiliaries (m3)

    staff_buildings_arearealNone

    footprint of staff buildings (m2)

    staff_buildings_hrealNone

    staff buildings height (m)

    stclrealNone

    clearance above crane to roof (m)

    tfcbvrealNone

    volume of TF coil power supply building (m3) (calculated if TF coils are superconducting)

    transp_clrncrealNone

    transportation clearance between components (m)

    trclrealNone

    transportation clearance between components (m)

    trivrealNone

    volume of tritium, fuel handling and health physics buildings (m3)

    turbine_hall_lrealNone

    turbine hall length, width, height (m)

    turbine_hall_wrealNone

    turbine hall length, width, height (m)

    turbine_hall_hrealNone

    turbine hall length, width, height (m)

    tw_storage_lrealNone

    tritiated waste storage building length, width, height (m)

    tw_storage_wrealNone

    tritiated waste storage building length, width, height (m)

    tw_storage_hrealNone

    tritiated waste storage building length, width, height (m)

    volrcirealNone

    internal volume of reactor building (m3)

    volnucbrealNone

    sum of nuclear buildings volumes (m3)

    warm_shop_lrealNone

    warm shop length, width, height (m)

    warm_shop_wrealNone

    warm shop length, width, height (m)

    warm_shop_hrealNone

    warm shop length, width, height (m)

    water_buildings_lrealNone

    water, laundry & drainage buildings length, width, height (m)

    water_buildings_wrealNone

    water, laundry & drainage buildings length, width, height (m)

    water_buildings_hrealNone

    water, laundry & drainage buildings length, width, height (m)

    wgtrealNone

    reactor building crane capacity (kg) (calculated if 0 is input)

    wgt2realNone

    hot cell crane capacity (kg) (calculated if 0 is input)

    workshop_lrealNone

    [cold] workshop buildings length, width, height (m)

    workshop_wrealNone

    [cold] workshop buildings length, width, height (m)

    workshop_hrealNone

    [cold] workshop buildings length, width, height (m)

    wrbirealNone

    distance from centre of machine to building wall (m)

    wsvolrealNone

    volume of warm shop building (m3)

    wsvfacrealNone

    warm shop building volume multiplication factor

    a_reactor_bldgrealNone

    Floor area of reactor building in m^2

    a_ee_ps_bldgrealNone

    Floor area of electrical equipment and power supply building in m^2

    a_aux_services_bldgrealNone

    Floor area of auxiliary services building in m^2

    a_hot_cell_bldgrealNone

    Floor area of hot cell building in m^2

    a_reactor_service_bldgrealNone

    Floor area of reactor service building in m^2

    a_service_water_bldgrealNone

    Floor area of service water building in m^2

    a_fuel_handling_bldgrealNone

    Floor area of fuel handling and storage building in m^2

    a_control_room_bldgrealNone

    Floor area of controlroom building in m^2

    a_ac_ps_bldgrealNone

    Floor area of AC power supply building in m^2

    a_admin_bldgrealNone

    Floor area of admin building in m^2

    a_site_service_bldgrealNone

    Floor area of site service building in m^2

    a_cryo_inert_gas_bldgrealNone

    Floor area of cryogenics and inert gas storage building in m^2

    a_security_bldgrealNone

    Floor area of security building in m^2

    times_variables

    Variable nameTypeInitialDescription
    pulsetimingsrealNone

    Switch for pulse timings (if lpulse=1):

    • =0, tohs = Ip(MA)/0.1 tramp, tqnch = input
    • =1, tohs = iteration var or input. tramp/tqnch max of input or tohs
    tburnrealNone

    burn time (s) (calculated if lpulse=1)

    tburn0realNone

    burn time (s) - used for internal consistency

    tcyclerealNone

    full cycle time (s)

    tdownrealNone

    down time (s)

    tdwellrealNone

    time between pulses in a pulsed reactor (s) (iteration variable 17)

    t_fusion_ramprealNone

    heating time, after current ramp up (s)

    timrealNone

    array of time points during plasma pulse (s)

    timelabelcharacterNone

    array of time labels during plasma pulse (s)

    intervallabelcharacterNone

    time intervals - as strings (s)

    tohsrealNone

    plasma current ramp-up time for current initiation (s) (calculated if lpulse=0) (iteration variable 65)

    tohsinrealNone

    Switch for plasma current ramp-up time (if lpulse=0):

    • = 0, tohs = tramp = tqnch = Ip(MA)/0.5
    • <>0, tohs = tohsin; tramp, tqnch are input
    tpulserealNone

    pulse length = tohs + t_fusion_ramp + tburn + tqnch

    tqnchrealNone

    shut down time for PF coils (s); if pulsed, = tohs

    tramprealNone

    initial PF coil charge time (s); if pulsed, = tohs

    physics_variables

    Variable nameTypeInitialDescription
    ipnlawsinteger50

    number of energy confinement time scaling laws

    abeamrealNone

    beam ion mass (amu)

    afuelrealNone

    average mass of fuel portion of ions (amu)

    aionrealNone

    average mass of all ions (amu)

    alphajrealNone

    current profile index (calculated from q_0 and q if iprofile=1)

    alphanrealNone

    density profile index

    alphaprealNone

    pressure profile index

    alpha_rate_density_totalrealNone

    Alpha particle production rate per unit volume, from plasma and beams [particles/m3/sec]

    alpha_rate_density_plasmarealNone

    Alpha particle production rate per unit volume, just from plasma [particles/m3/sec]

    alphatrealNone

    temperature profile index

    aspectrealNone

    aspect ratio (iteration variable 1)

    beamfus0realNone

    multiplier for beam-background fusion calculation

    betarealNone

    total plasma beta (iteration variable 5) (calculated if stellarator)

    betaftrealNone

    fast alpha beta component

    betalimrealNone

    allowable beta

    betalim_lowerrealNone

    allowable lower beta

    beta_beamrealNone

    neutral beam beta component

    betaprealNone

    poloidal beta

    normalised_total_betarealNone

    normaised total beta

    betbm0realNone

    leading coefficient for NB beta fraction

    bprealNone

    poloidal field (T)

    btrealNone

    toroidal field on axis (T) (iteration variable 2)

    btotrealNone

    total toroidal + poloidal field (T)

    burnuprealNone

    fractional plasma burnup

    burnup_inrealNone

    fractional plasma burnup user input

    bvertrealNone

    vertical field at plasma (T)

    c_betarealNone

    Destabalisation parameter for iprofile=6 beta limit

    csawthrealNone

    coeff. for sawteeth effects on burn V-s requirement

    cvolrealNone

    multiplying factor times plasma volume (normally=1)

    cwrmaxrealNone

    maximum ratio of conducting wall distance to plasma minor radius for vertical stability (constraint equation 23)

    denerealNone

    electron density (/m3) (iteration variable 6)

    denirealNone

    fuel ion density (/m3)

    dlameerealNone

    electron-electron coulomb logarithm

    dlamierealNone

    ion-electron coulomb logarithm

    dlimitrealNone

    density limit (/m3) as calculated using various models

    dnalprealNone

    thermal alpha density (/m3)

    dnbeamrealNone

    hot beam ion density, variable (/m3)

    beam_density_outrealNone

    hot beam ion density from calculation (/m3)

    dnbetarealNone

    Troyon-like coefficient for beta scaling

    dnelimtrealNone

    density limit (/m3)

    dnitotrealNone

    total ion density (/m3)

    dnlarealNone

    line averaged electron density (/m3)

    dnprotrealNone

    proton ash density (/m3)

    dntaurealNone

    plasma average "n-tau" (seconds/m3)

    dnzrealNone

    high Z ion density (/m3)

    gradient_length_nerealNone

    Max. normalized gradient length in el. density (ipedestal==0 only)

    gradient_length_terealNone

    Max. normalized gradient length in el. temperature (ipedestal==0 only)

    epbetmaxrealNone

    maximum (eps*beta_poloidal) (constraint equation 6). Note: revised issue #346 "Operation at the tokamak equilibrium poloidal beta-limit in TFTR", 1992 Nucl. Fusion 32 1468

    epsrealNone

    inverse aspect ratio

    aux_current_fractionrealNone

    fraction of plasma current produced by auxiliary current drive

    inductive_current_fractionrealNone

    fraction of plasma current produced inductively

    f_alpha_electronrealNone

    fraction of alpha energy to electrons

    f_alpha_plasmarealNone

    Fraction of alpha power deposited in plasma. Default of 0.95 taken from https://doi.org/10.1088/0029-5515/39/12/305.

    f_alpha_ionrealNone

    fraction of alpha power to ions

    f_deuteriumrealNone

    deuterium fuel fraction

    ftarrealNone

    fraction of power to the lower divertor in double null configuration (i_single_null = 0 only) (default assumes SN)

    ffwalrealNone

    factor to convert plasma surface area to first wall area in neutron wall load calculation (iwalld=1)

    fgwpedrealNone

    fraction of Greenwald density to set as pedestal-top density. If <0, pedestal-top density set manually using neped (ipedestal==1). (iteration variable 145)

    fgwseprealNone

    fraction of Greenwald density to set as separatrix density. If <0, separatrix density set manually using nesep (ipedestal==1). (iteration variable 152)

    f_helium3realNone

    helium-3 fuel fraction

    figmerrealNone

    physics figure of merit (= plasma_currentaspect*sbar, where sbar=1)

    fkzohmrealNone

    Zohm elongation scaling adjustment factor (ishape=2, 3)

    fplhseprealNone

    F-value for Psep >= Plh + Paux (constraint equation 73)

    fpdivlimrealNone

    F-value for minimum pdivt (constraint equation 80)

    fne0realNone

    f-value for the constraint ne(0) > ne(ped) (constraint equation 81) (Iteration variable 154)

    f_tritiumrealNone

    tritium fuel fraction

    fusion_rate_density_totalrealNone

    fusion reaction rate, from beams and plasma (reactions/m3/sec)

    fusion_rate_density_plasmarealNone

    fusion reaction rate, just from plasma (reactions/m3/sec)

    fvsbrnnirealNone

    fraction of the plasma current produced by non-inductive means (iteration variable 44)

    gammarealNone

    Ejima coefficient for resistive startup V-s formula

    gammaftrealNone

    ratio of (fast alpha + neutral beam beta) to thermal beta

    hfacrealNone

    H factors for an ignited plasma for each energy confinement time scaling law

    hfactrealNone

    H factor on energy confinement times, radiation corrected (iteration variable 10).

    taumaxrealNone

    Maximum allowed energy confinement time (s)

    i_bootstrap_currentintegerNone

    switch for bootstrap current scaling

    • =1 ITER 1989 bootstrap scaling (high R/a only)
    • =2 for Nevins et al general scaling
    • =3 for Wilson et al numerical scaling
    • =4 for Sauter et al scaling
    • =5 for Sakai et al scaling
    • =6 for ARIES scaling
    • =7 for Andrade et al scaling
    • =8 for Hoang et al scaling
    • =9 for Wong et al scaling
    • =10 for Gi-I et al scaling
    • =11 for Gi-II et al scaling
    iculblintegerNone

    switch for beta limit scaling (constraint equation 24)

    • =0 apply limit to total beta
    • =1 apply limit to thermal beta
    • =2 apply limit to thermal + neutral beam beta
    • =3 apply limit to toroidal beta
    i_plasma_currentintegerNone

    switch for plasma current scaling to use

    • =1 Peng analytic fit
    • =2 Peng double null divertor scaling (ST)
    • =3 simple ITER scaling (k = 2.2, d = 0.6)
    • =4 later ITER scaling, a la Uckan
    • =5 Todd empirical scaling I
    • =6 Todd empirical scaling II
    • =7 Connor-Hastie model
    • =8 Sauter scaling allowing negative triangularity
    • =9 FIESTA ST fit
    i_diamagnetic_currentintegerNone

    switch for diamagnetic current scaling

    • =0 Do not calculate
    • =1 Use original TART scaling
    • =2 Use SCENE scaling
    idenslintegerNone

    switch for density limit to enforce (constraint equation 5)

    • =1 old ASDEX
    • =2 Borrass model for ITER (I)
    • =3 Borrass model for ITER (II)
    • =4 JET edge radiation
    • =5 JET simplified
    • =6 Hugill-Murakami Mq limit
    • =7 Greenwald limit
    idivrtintegerNone

    number of divertors (calculated from i_single_null)

    ifalphapintegerNone

    switch for fast alpha pressure calculation

    • =0 ITER physics rules (Uckan) fit
    • =1 Modified fit (D. Ward) - better at high temperature
    igniteintegerNone

    switch for ignition assumption. Obviously, ignite must be zero if current drive is required. If ignite is 1, any auxiliary power is assumed to be used only during plasma start-up, and is excluded from all steady-state power balance calculations.

    • =0 do not assume plasma ignition
    • =1 assume ignited (but include auxiliary power in costs)</UL
    iinvqdintegerNone

    switch for inverse quadrature in L-mode scaling laws 5 and 9:

    • =0 inverse quadrature not used
    • =1 inverse quadrature with Neo-Alcator tau-E used
    ipedestalintegerNone

    switch for pedestal profiles:

    • =0 use original parabolic profiles
    • =1 use pedestal profile
    i_pfirsch_schluter_currentintegerNone

    switch for Pfirsch-Schlüter current scaling (issue #413):

    • =0 Do not calculate
    • =1 Use SCENE scaling
    nepedrealNone

    electron density of pedestal [m-3] (`ipedestal==1)

    neseprealNone

    electron density at separatrix [m-3] (`ipedestal==1)

    alpha_critrealNone

    critical ballooning parameter value

    nesep_critrealNone

    critical electron density at separatrix [m-3]

    plasma_res_factorrealNone

    plasma resistivity pre-factor

    rhopednrealNone

    r/a of density pedestal (ipedestal==1)

    rhopedtrealNone

    r/a of temperature pedestal (ipedestal==1)

    rho_te_maxrealNone

    r/a where the temperature gradient is largest (ipedestal==0)

    rho_ne_maxrealNone

    r/a where the density gradient is largest (ipedestal==0)

    tbetarealNone

    temperature profile index beta (`ipedestal==1)

    tepedrealNone

    electron temperature of pedestal (keV) (ipedestal==1)

    teseprealNone

    electron temperature at separatrix (keV) (ipedestal==1) calculated if reinke criterion is used (icc=78)

    iprofileintegerNone

    switch for current profile consistency:

    • =0 use input values for alphaj, rli, dnbeta
    • =1 make these consistent with input q, q_0 values (recommend i_plasma_current=4 with this option)
    • =2 use input values for alphaj, rli. Scale dnbeta with aspect ratio (original scaling)
    • =3 use input values for alphaj, rli. Scale dnbeta with aspect ratio (Menard scaling)
    • =4 use input values for alphaj, dnbeta. Set rli from elongation (Menard scaling)
    • =5 use input value for alphaj. Set rli and dnbeta from Menard scaling
    • =6 use input values for alphaj, c_beta. Set rli from Menard and dnbeta from Tholerus
    iradlossintegerNone

    switch for radiation loss term usage in power balance (see User Guide):

    • =0 total power lost is scaling power plus radiation
    • =1 total power lost is scaling power plus core radiation only
    • =2 total power lost is scaling power only, with no additional allowance for radiation. This is not recommended for power plant models.
    iscintegerNone

    switch for energy confinement time scaling law (see description in tauscl)

    tausclcharacter(/'Neo-Alcator      (ohmic)', 'Mirnov               (H)', 'Merezkhin-Muhkovatov (L)', 'Shimomura            (H)', 'Kaye-Goldston        (L)', 'ITER 89-P            (L)', 'ITER 89-O            (L)', 'Rebut-Lallia         (L)', 'Goldston             (L)', 'T10                  (L)', 'JAERI-88             (L)', 'Kaye-Big Complex     (L)', 'ITER H90-P           (H)', 'ITER Mix             (L)', 'Riedel               (L)', 'Christiansen         (L)', 'Lackner-Gottardi     (L)', 'Neo-Kaye             (L)', 'Riedel               (H)', 'ITER H90-P amended   (H)', 'LHD              (stell)', 'Gyro-reduced Bohm(stell)', 'Lackner-Gottardi (stell)', 'ITER-93H             (H)', 'TITAN RFP OBSOLETE      ', 'ITER H-97P ELM-free  (H)', 'ITER H-97P ELMy      (H)', 'ITER-96P             (L)', 'Valovic modified ELMy(H)', 'Kaye PPPL April 98   (L)', 'ITERH-PB98P(y)       (H)', 'IPB98(y)             (H)', 'IPB98(y,1)           (H)', 'IPB98(y,2)           (H)', 'IPB98(y,3)           (H)', 'IPB98(y,4)           (H)', 'ISS95            (stell)', 'ISS04            (stell)', 'DS03                 (H)', 'Murari et al NPL     (H)', 'Petty 2008           (H)', 'Lang et al. 2012     (H)', 'Hubbard 2017 - nom   (I)', 'Hubbard 2017 - lower (I)', 'Hubbard 2017 - upper (I)', 'NSTX (Spherical)     (H)', 'NSTX-Petty08 Hybrid  (H)', 'NSTX gyro-Bohm Buxton(H)', 'Input tauee_in          ', 'ITPA20               (H)'/)

    tauscl(ipnlaws) : labels describing energy confinement scaling laws:

    • ( 1) Neo-Alcator (ohmic)
    • ( 2) Mirnov (H-mode)
    • ( 3) Merezkhin-Muhkovatov (L-mode)
    • ( 4) Shimomura (H-mode)
    • ( 5) Kaye-Goldston (L-mode)
    • ( 6) ITER 89-P (L-mode)
    • ( 7) ITER 89-O (L-mode)
    • ( 8) Rebut-Lallia (L-mode)
    • ( 9) Goldston (L-mode)
    • (10) T10 (L-mode)
    • (11) JAERI-88 (L-mode)
    • (12) Kaye-Big Complex (L-mode)
    • (13) ITER H90-P (H-mode)
    • (14) ITER Mix (L-mode)
    • (15) Riedel (L-mode)
    • (16) Christiansen (L-mode)
    • (17) Lackner-Gottardi (L-mode)
    • (18) Neo-Kaye (L-mode)
    • (19) Riedel (H-mode)
    • (20) ITER H90-P amended (H-mode)
    • (21) LHD (stellarator)
    • (22) Gyro-reduced Bohm (stellarator)
    • (23) Lackner-Gottardi (stellarator)
    • (24) ITER-93H (H-mode)
    • (25) OBSOLETE
    • (26) ITER H-97P ELM-free (H-mode)
    • (27) ITER H-97P ELMy (H-mode)
    • (28) ITER-96P (=ITER-97L) (L-mode)
    • (29) Valovic modified ELMy (H-mode)
    • (30) Kaye PPPL April 98 (L-mode)
    • (31) ITERH-PB98P(y) (H-mode)
    • (32) IPB98(y) (H-mode)
    • (33) IPB98(y,1) (H-mode)
    • (34) IPB98(y,2) (H-mode)
    • (35) IPB98(y,3) (H-mode)
    • (36) IPB98(y,4) (H-mode)
    • (37) ISS95 (stellarator)
    • (38) ISS04 (stellarator)
    • (39) DS03 (H-mode)
    • (40) Murari et al non-power law (H-mode)
    • (41) Petty 2008 (H-mode)
    • (42) Lang et al. 2012 (H-mode)
    • (43) Hubbard 2017 (I-mode) - nominal
    • (44) Hubbard 2017 (I-mode) - lower bound
    • (45) Hubbard 2017 (I-mode) - upper bound
    • (46) NSTX (H-mode; Spherical tokamak)
    • (47) NSTX-Petty08 Hybrid (H-mode)
    • (48) NSTX gyro-Bohm (Buxton) (H-mode; Spherical tokamak)
    • (49) Use input tauee_in

    iscrpintegerNone

    switch for plasma-first wall clearances:

    • =0 use 10% of rminor
    • =1 use input (scrapli and scraplo)
    ishapeintegerNone

    switch for plasma cross-sectional shape calculation:

    • =0 use input kappa, triang to calculate 95% values
    • =1 scale qlim, kappa, triang with aspect ratio (ST)
    • =2 set kappa to the natural elongation value (Zohm ITER scaling), triang input
    • =3 set kappa to the natural elongation value (Zohm ITER scaling), triang95 input
    • =4 use input kappa95, triang95 to calculate separatrix values
    • =5 use input kappa95, triang95 to calculate separatrix values based on MAST scaling (ST)
    • =6 use input kappa, triang to calculate 95% values based on MAST scaling (ST)
    • =7 use input kappa95, triang95 to calculate separatrix values based on fit to FIESTA (ST)
    • =8 use input kappa, triang to calculate 95% values based on fit to FIESTA (ST)
    • =9 set kappa to the natural elongation value, triang input
    • =10 set kappa to maximum stable value at a given aspect ratio (2.6<A<3.6)), triang input (#1399)
    • =11 set kappa Menard 2016 aspect-ratio-dependent scaling, triang input (#1439)
    itartintegerNone

    switch for spherical tokamak (ST) models:

    • =0 use conventional aspect ratio models
    • =1 use spherical tokamak models
    itartpfintegerNone

    switch for Spherical Tokamak PF models:

    • =0 use Peng and Strickler (1986) model
    • =1 use conventional aspect ratio model
    iwalldintegerNone

    switch for neutron wall load calculation:

    • =1 use scaled plasma surface area
    • =2 use first wall area directly
    kapparealNone

    plasma separatrix elongation (calculated if ishape = 1-5, 7 or 9-10)

    kappa95realNone

    plasma elongation at 95% surface (calculated if ishape = 0-3, 6, or 8-10)

    kappaarealNone

    plasma elongation calculated as xarea/(pi.a^2)

    kappaa_IPBrealNone

    Volume measure of plasma elongation

    ne0realNone

    central electron density (/m3)

    ni0realNone

    central ion density (/m3)

    m_s_limitrealNone

    margin to vertical stability

    p0realNone

    central total plasma pressure (Pa)

    vol_avg_pressurerealNone

    Volume averaged plasma pressure (Pa)

    f_dd_branching_tritrealNone

    branching ratio for DD -> T

    alpha_power_density_plasmarealNone

    Alpha power per volume just from plasma [MW/m3]

    alpha_power_density_totalrealNone

    Alpha power per volume from plasma and beams [MW/m3]

    alpha_power_electron_densityrealNone

    Alpha power per volume to electrons [MW/m3]

    palpfwmwrealNone

    alpha power escaping plasma and reaching first wall (MW)

    alpha_power_ions_densityrealNone

    alpha power per volume to ions (MW/m3)

    alpha_power_plasmarealNone

    Alpha power from only the plasma (MW)

    alpha_power_totalrealNone

    Total alpha power from plasma and beams (MW)

    alpha_power_beamsrealNone

    alpha power from hot neutral beam ions (MW)

    non_alpha_charged_powerrealNone

    non-alpha charged particle fusion power (MW)

    charged_particle_powerrealNone

    Total charged particle fusion power [MW]

    charged_power_densityrealNone

    Non-alpha charged particle fusion power per volume [MW/m3]

    pcoefrealNone

    profile factor (= n-weighted T / average T)

    pinnerzoneradmwrealNone

    radiation power from inner zone (MW)

    pcoreradpvrealNone

    total core radiation power per volume (MW/m3)

    dd_powerrealNone

    deuterium-deuterium fusion power (MW)

    dhe3_powerrealNone

    deuterium-helium3 fusion power (MW)

    pdivtrealNone

    power to conducted to the divertor region (MW)

    pdivlrealNone

    power conducted to the lower divertor region (calculated if i_single_null = 0) (MW)

    pdivurealNone

    power conducted to the upper divertor region (calculated if i_single_null = 0) (MW)

    pdivmaxrealNone

    power conducted to the divertor with most load (calculated if i_single_null = 0) (MW)

    dt_power_totalrealNone

    Total deuterium-tritium fusion power, from plasma and beams [MW]

    dt_power_plasmarealNone

    Deuterium-tritium fusion power, just from plasma [MW]

    pouterzoneradmwrealNone

    radiation power from outer zone (MW)

    pedgeradpvrealNone

    edge radiation power per volume (MW/m3)

    phiintrealNone

    internal plasma V-s

    photon_wallrealNone

    Nominal mean radiation load on inside surface of reactor (MW/m2)

    piepvrealNone

    ion/electron equilibration power per volume (MW/m3)

    plasma_currentrealNone

    plasma current (A)

    neutron_power_plasmarealNone

    Neutron fusion power from just the plasma [MW]

    neutron_power_totalrealNone

    Total neutron fusion power from plasma and beams [MW]

    neutron_power_density_totalrealNone

    neutron fusion power per volume from beams and plasma (MW/m3)

    neutron_power_density_plasmarealNone

    neutron fusion power per volume just from plasma (MW/m3)

    pohmmwrealNone

    ohmic heating power (MW)

    pohmpvrealNone

    ohmic heating power per volume (MW/m3)

    powerhtrealNone

    heating power (= transport loss power) (MW) used in confinement time calculation

    fusion_powerrealNone

    fusion power (MW)

    pperimrealNone

    plasma poloidal perimeter (m)

    pradmwrealNone

    total radiation power from inside LCFS (MW)

    pradpvrealNone

    total radiation power per volume (MW/m3)

    pradsolmwrealNone

    radiation power from SoL (MW)

    proton_rate_densityrealNone

    Proton production rate [particles/m3/sec]

    psolradmwrealNone

    SOL radiation power (MW) (stellarator only)

    psyncpvrealNone

    synchrotron radiation power per volume (MW/m3)

    ilhthreshintegerNone

    switch for L-H mode power threshold scaling to use (see pthrmw for list)

    plhthreshrealNone

    L-H mode power threshold (MW) (chosen via ilhthresh, and enforced if constraint equation 15 is on)

    pthrmwrealNone

    L-H power threshold for various scalings (MW)

    • =1 ITER 1996 scaling: nominal
    • =2 ITER 1996 scaling: upper bound
    • =3 ITER 1996 scaling: lower bound
    • =4 ITER 1997 scaling: excluding elongation
    • =5 ITER 1997 scaling: including elongation
    • =6 Martin 2008 scaling: nominal
    • =7 Martin 2008 scaling: 95% upper bound
    • =8 Martin 2008 scaling: 95% lower bound
    • =9 Snipes 2000 scaling: nominal
    • =10 Snipes 2000 scaling: upper bound
    • =11 Snipes 2000 scaling: lower bound
    • =12 Snipes 2000 scaling (closed divertor): nominal
    • =13 Snipes 2000 scaling (closed divertor): upper bound
    • =14 Snipes 2000 scaling (closed divertor): lower bound
    • =15 Hubbard et al. 2012 L-I threshold scaling: nominal
    • =16 Hubbard et al. 2012 L-I threshold scaling: lower bound
    • =17 Hubbard et al. 2012 L-I threshold scaling: upper bound
    • =18 Hubbard et al. 2017 L-I threshold scaling
    • =19 Martin 2008 aspect ratio corrected scaling: nominal
    • =20 Martin 2008 aspect ratio corrected scaling: 95% upper bound
    • =21 Martin 2008 aspect ratio corrected scaling: 95% lower bound
    ptremwrealNone

    electron transport power (MW)

    ptrepvrealNone

    electron transport power per volume (MW/m3)

    ptrimwrealNone

    ion transport power (MW)

    pscalingmwrealNone

    Total transport power from scaling law (MW)

    ptripvrealNone

    ion transport power per volume (MW/m3)

    qrealNone

    Safety factor 'near' plasma edge (iteration variable 18) equal to q95 (unless i_plasma_current=2 (ST current scaling), in which case q = mean edge safety factor qbar)

    q0realNone

    safety factor on axis

    q95realNone

    safety factor at 95% surface

    qfuelrealNone

    plasma fuelling rate (nucleus-pairs/s)

    tauratiorealNone

    tauratio /1.0/ : ratio of He and pellet particle confinement times

    qlimrealNone

    lower limit for edge safety factor

    qstarrealNone

    cylindrical safety factor

    rad_fraction_solrealNone

    SoL radiation fraction

    rad_fraction_totalrealNone

    Radiation fraction total = SoL + LCFS radiation / total power deposited in plasma

    ralpnerealNone

    thermal alpha density/electron density (iteration variable 109)

    protiumrealNone

    Seeded protium density / electron density.

    rlirealNone

    plasma normalised internal inductance (calculated from alphaj if iprofile=1)

    rlprealNone

    plasma inductance (H)

    rmajorrealNone

    plasma major radius (m) (iteration variable 3)

    rminorrealNone

    plasma minor radius (m)

    rnbeamrealNone

    hot beam density / n_e (iteration variable 7)

    rncnerealNone

    n_carbon / n_e

    rndfuelrealNone

    fuel burnup rate (reactions/second)

    rnfenerealNone

    n_highZ / n_e

    rnonerealNone

    n_oxygen / n_e

    rpfacrealNone

    neo-classical correction factor to rplas

    rplasrealNone

    plasma resistance (ohm)

    res_timerealNone

    plasma current resistive diffusion time (s)

    sarearealNone

    plasma surface area

    sareaorealNone

    outboard plasma surface area

    sfrealNone

    shape factor = plasma poloidal perimeter / (2.pi.rminor)

    i_single_nullintegerNone

    switch for single null / double null plasma:

    • =0 for double null
    • =1 for single null (diverted side down)
    ssyncrealNone

    synchrotron wall reflectivity factor

    taueerealNone

    electron energy confinement time (sec)

    tauee_inrealNone

    Input electron energy confinement time (sec) (isc=48 only)

    taueffrealNone

    global thermal energy confinement time (sec)

    taueirealNone

    ion energy confinement time (sec)

    tauprealNone

    alpha particle confinement time (sec)

    terealNone

    volume averaged electron temperature (keV) (iteration variable 4)

    te0realNone

    central electron temperature (keV)

    tenrealNone

    density weighted average electron temperature (keV)

    tirealNone

    volume averaged ion temperature (keV). N.B. calculated from te if tratio > 0.0

    ti0realNone

    central ion temperature (keV)

    tinrealNone

    density weighted average ion temperature (keV)

    tratiorealNone

    ion temperature / electron temperature(used to calculate ti if tratio > 0.0

    triangrealNone

    plasma separatrix triangularity (calculated if ishape = 1, 3-5 or 7)

    triang95realNone

    plasma triangularity at 95% surface (calculated if ishape = 0-2, 6, 8 or 9)

    plasma_volumerealNone

    plasma volume (m3)

    vsbrnrealNone

    V-s needed during flat-top (heat + burn times) (Wb)

    vshiftrealNone

    plasma/device midplane vertical shift - single null

    vsindrealNone

    internal and external plasma inductance V-s (Wb)

    vsresrealNone

    resistive losses in startup V-s (Wb)

    vssttrealNone

    total V-s needed (Wb)

    wallmwrealNone

    average neutron wall load (MW/m2)

    wtgpdrealNone

    mass of fuel used per day (g)

    xarearealNone

    plasma cross-sectional area (m2)

    zeffrealNone

    plasma effective charge

    zeffairealNone

    mass weighted plasma effective charge

    cost_variables

    Variable nameTypeInitialDescription
    abktflncrealNone

    allowable first wall/blanket neutron fluence (MW-yr/m2) (blktmodel=0)

    adivflncrealNone

    allowable divertor heat fluence (MW-yr/m2)

    blkcstrealNone

    blanket direct cost (M$)

    c221realNone

    total account 221 cost (M$) - first wall, blanket, shield, support structure and div plates

    c222realNone

    total account 222 cost (M$) - TF coils + PF coils

    capcostrealNone

    total capital cost including interest (M$)

    cconfixrealNone

    fixed cost of superconducting cable ($/m)

    cconshpfrealNone

    cost of PF coil steel conduit/sheath ($/m)

    cconshtfrealNone

    cost of TF coil steel conduit/sheath ($/m)

    cdcostrealNone

    current drive direct costs (M$)

    cdirtrealNone

    total plant direct cost (M$)

    cdrliferealNone

    Full power year lifetime of heating/current drive system (y)

    cdrlife_calrealNone

    Calendar year lifetime of heating/current drive system (y)

    cfactrrealNone

    Total plant availability fraction; input if iavail=0

    cpfactrealNone

    Total plant capacity factor

    cfindrealNone

    indirect cost factor (func of lsa) (cost model = 0)

    clandrealNone

    cost of land (M$)

    coerealNone

    cost of electricity ($/MW-hr)

    coecaprealNone

    capital cost of electricity (m$/kW-hr)

    coefueltrealNone

    'fuel' (including replaceable components) contribution to cost of electricity (m$/kW-hr)

    coeoamrealNone

    operation and maintenance contribution to cost of electricity (m$/kW-hr)

    concostrealNone

    plant construction cost (M$)

    costexprealNone

    cost exponent for scaling in 2015 costs model

    costexp_pebblesrealNone

    cost exponent for pebbles in 2015 costs model

    cost_factor_buildingsrealNone

    cost scaling factor for buildings

    cost_factor_landrealNone

    cost scaling factor for land

    cost_factor_tf_coilsrealNone

    cost scaling factor for TF coils

    cost_factor_fwbsrealNone

    cost scaling factor for fwbs

    cost_factor_rhrealNone

    cost scaling factor for remote handling

    cost_factor_vvrealNone

    cost scaling factor for vacuum vessel

    cost_factor_boprealNone

    cost scaling factor for energy conversion system

    cost_factor_miscrealNone

    cost scaling factor for remaining subsystems

    maintenance_fwbsrealNone

    Maintenance cost factor: first wall, blanket, shield, divertor

    maintenance_genrealNone

    Maintenance cost factor: All other components except coils, vacuum vessel, thermal shield, cryostat, land

    amortizationrealNone

    amortization factor (fixed charge factor) "A" (years)

    cost_modelintegerNone

    Switch for cost model:

    • =0 use $ 1990 PROCESS model
    • =1 use $ 2014 Kovari model
    • =2 use user-provided model
    i_cp_lifetimeintegerNone

    Switch for the centrepost lifetime constraint 0 : The CP full power year lifetime is set by the user via cplife_input 1 : The CP lifetime is equal to the divertor lifetime 2 : The CP lifetime is equal to the breeding blankets lifetime 3 : The CP lifetime is equal to the plant lifetime

    cownerrealNone

    owner cost factor

    cplife_inputrealNone

    User input full power year lifetime of the centrepost (years) (i_cp_lifetime = 0)

    cpliferealNone

    Calculated full power year lifetime of centrepost (years)

    cplife_calrealNone

    Calculated calendar year lifetime of centrepost (years)

    cpstcstrealNone

    ST centrepost direct cost (M$)

    cpstflncrealNone

    allowable ST centrepost neutron fluence (MW-yr/m2)

    crctcorerealNone

    reactor core costs (categories 221, 222 and 223)

    csirealNone

    allowance for site costs (M$)

    cturbbrealNone

    cost of turbine building (M$)

    decomfrealNone

    proportion of constructed cost required for decommissioning fund

    dintrtrealNone

    diff between borrowing and saving interest rates

    divcstrealNone

    divertor direct cost (M$)

    divliferealNone

    Full power lifetime of divertor (y)

    divlife_calrealNone

    Calendar year lifetime of divertor (y)

    dtliferealNone

    period prior to the end of the plant life that the decommissioning fund is used (years)

    fcap0realNone

    average cost of money for construction of plant assuming design/construction time of six years

    fcap0cprealNone

    average cost of money for replaceable components assuming lead time for these of two years

    fcdfuelrealNone

    fraction of current drive cost treated as fuel (if ifueltyp = 1)

    fcontngrealNone

    project contingency factor

    fcr0realNone

    fixed charge rate during construction

    fkindrealNone

    multiplier for Nth of a kind costs

    fwallcstrealNone

    first wall cost (M$)

    iavailintegerNone

    Switch for plant availability model:

    • =0 use input value for cfactr
    • =1 calculate cfactr using Taylor and Ward 1999 model
    • =2 calculate cfactr using new (2015) model
    • =3 calculate cfactr using ST model
    ibkt_lifeintegerNone

    Switch for fw/blanket lifetime calculation in availability module:

    • =0 use neutron fluence model
    • =1 use fusion power model (DEMO only)
    life_dparealNone

    Allowable DPA from DEMO fw/blanket lifetime calculation in availability module

    bktcyclesrealNone

    Number of fusion cycles to reach allowable DPA from DEMO fw/blanket lifetime calculation

    avail_minrealNone

    Minimum availability (constraint equation 61)

    tok_build_cost_per_volrealNone

    Unit cost for tokamak complex buildings, including building and site services ($/m3)

    light_build_cost_per_volrealNone

    Unit cost for unshielded non-active buildings ($/m3)

    favailrealNone

    F-value for minimum availability (constraint equation 61)

    num_rh_systemsintegerNone

    Number of remote handling systems (1-10)

    conf_magrealNone

    c parameter, which determines the temperature margin at which magnet lifetime starts to decline

    div_prob_failrealNone

    Divertor probability of failure (per op day)

    div_umain_timerealNone

    Divertor unplanned maintenance time (years)

    div_nrefrealNone

    Reference value for cycle cycle life of divertor

    div_nurealNone

    The cycle when the divertor fails with 100% probability

    fwbs_nrefrealNone

    Reference value for cycle life of blanket

    fwbs_nurealNone

    The cycle when the blanket fails with 100% probability

    fwbs_prob_failrealNone

    Fwbs probability of failure (per op day)

    fwbs_umain_timerealNone

    Fwbs unplanned maintenance time (years)

    redun_vacprealNone

    Vacuum system pump redundancy level (%)

    redun_vacintegerNone

    Number of redundant vacuum pumps

    t_operationrealNone

    Operational time (yrs)

    tbktreplrealNone

    time taken to replace blanket (y) (iavail=1)

    tcomreplrealNone

    time taken to replace both blanket and divertor (y) (iavail=1)

    tdivreplrealNone

    time taken to replace divertor (y) (iavail=1)

    uuboprealNone

    unplanned unavailability factor for balance of plant (iavail=1)

    uucdrealNone

    unplanned unavailability factor for current drive (iavail=1)

    uudivrealNone

    unplanned unavailability factor for divertor (iavail=1)

    uufuelrealNone

    unplanned unavailability factor for fuel system (iavail=1)

    uufwrealNone

    unplanned unavailability factor for first wall (iavail=1)

    uumagrealNone

    unplanned unavailability factor for magnets (iavail=1)

    uuvesrealNone

    unplanned unavailability factor for vessel (iavail=1)

    ifueltypintegerNone

    Switch for fuel type:

    • =2 treat initial blanket, divertor, first wall as capital costs. Treat all later items and fraction fcdfuel of CD equipment as fuel costs
    • =1 treat blanket divertor, first wall and fraction fcdfuel of CD equipment as fuel cost
    • =0 treat these as capital cost
    ipnetintegerNone

    Switch for net electric power calculation:

    • =0 scale so that always > 0
    • =1 let go < 0 (no c-o-e)
    ireactorintegerNone

    Switch for net electric power and cost of electricity calculations:

    • =0 do not calculate MW(electric) or c-o-e
    • =1 calculate MW(electric) and c-o-e
    lsaintegerNone

    Level of safety assurance switch (generally, use 3 or 4):

    • =1 truly passively safe plant
    • =2,3 in-between
    • =4 like current fission plant
    moneyintrealNone

    interest portion of capital cost (M$)

    output_costsintegerNone

    Switch for costs output:

    • =0 do not write cost-related outputs to file
    • =1 write cost-related outputs to file
    discount_raterealNone

    effective cost of money in constant dollars

    startupratiorealNone

    ratio of additional HCD power for start-up to flat-top operational requirements

    startuppwrrealNone

    cost associated with additional HCD system power required on start-up ($)

    supercond_cost_modelintegerNone

    Switch for superconductor cost model:

    • =0 use $/kg
    • =1 use $/kAm
    tliferealNone

    Full power year plant lifetime (years)

    tmainrealNone

    Maintenance time for replacing CP (years) (iavail = 3)

    u_unplanned_cprealNone

    User-input CP unplanned unavailability (iavail = 3)

    ucadreal180.0D0

    unit cost for administration buildings (M$/m3)

    ucafreal1.5D6

    unit cost for aux facility power equipment ($)

    ucahtsreal31.0D0

    unit cost for aux heat transport equipment ($/W**exphts)

    ucapreal17.0D0

    unit cost of auxiliary transformer ($/kVA)

    ucblberealNone

    unit cost for blanket beryllium ($/kg)

    ucblbreedrealNone

    unit cost for breeder material ($/kg) (blktmodel>0)

    ucbllirealNone

    unit cost for blanket lithium ($/kg) (30% Li6)

    ucblli2orealNone

    unit cost for blanket Li_2O ($/kg)

    ucbllipbrealNone

    unit cost for blanket Li-Pb ($/kg) (30% Li6)

    ucblssrealNone

    unit cost for blanket stainless steel ($/kg)

    ucblvdrealNone

    unit cost for blanket vanadium ($/kg)

    ucbpmpreal2.925D5

    vacuum system backing pump cost ($)

    ucbusrealNone

    cost of aluminium bus for TF coil ($/A-m)

    uccaserealNone

    cost of superconductor case ($/kg)

    uccoreal350.0D0

    unit cost for control buildings (M$/m3)

    uccpcl1realNone

    cost of high strength tapered copper ($/kg)

    uccpclbrealNone

    cost of TF outboard leg plate coils ($/kg)

    uccpmpreal3.9D5

    vacuum system cryopump cost ($)

    uccrreal460.0D0

    unit cost for cryogenic building (M$/vol)

    uccryrealNone

    heat transport system cryoplant costs ($/W**expcry)

    uccryorealNone

    unit cost for vacuum vessel ($/kg)

    uccurealNone

    unit cost for copper in superconducting cable ($/kg)

    ucdgenreal1.7D6

    cost per 8 MW diesel generator ($)

    ucdivrealNone

    cost of divertor blade ($)

    ucdtcreal13.0D0

    detritiation, air cleanup cost ($/10000m3/hr)

    ucductreal4.225D4

    vacuum system duct cost ($/m)

    ucechrealNone

    ECH system cost ($/W)

    ucelreal380.0D0

    unit cost for electrical equipment building (M$/m3)

    uces1real3.2D4

    MGF (motor-generator flywheel) cost factor ($/MVA**0.8)

    uces2real8.8D3

    MGF (motor-generator flywheel) cost factor ($/MJ**0.8)

    ucf1realNone

    cost of fuelling system ($)

    ucfncrealNone

    outer PF coil fence support cost ($/kg)

    ucfprreal4.4D7

    cost of 60g/day tritium processing unit ($)

    ucfuelrealNone

    unit cost of D-T fuel (M$/year/1200MW)

    ucfwareal6.0D4

    first wall armour cost ($/m2)

    ucfwpsreal1.0D7

    first wall passive stabiliser cost ($)

    ucfwsreal5.3D4

    first wall structure cost ($/m2)

    ucgssreal35.0D0

    cost of reactor structure ($/kg)

    uche3realNone

    cost of helium-3 ($/kg)

    uchrsrealNone

    cost of heat rejection system ($)

    uchtsrealNone

    cost of heat transport system equipment per loop ($/W); dependent on coolant type (coolwh)

    uciacrealNone

    cost of instrumentation, control & diagnostics ($)

    ucichrealNone

    ICH system cost ($/W)

    ucintreal35.0D0

    superconductor intercoil structure cost ($/kg)

    uclhrealNone

    lower hybrid system cost ($/W)

    uclvreal16.0D0

    low voltage system cost ($/kVA)

    ucmbreal260.0D0

    unit cost for reactor maintenance building (M$/m3)

    ucmerealNone

    cost of maintenance equipment ($)

    ucmiscrealNone

    miscellaneous plant allowance ($)

    ucnbirealNone

    NBI system cost ($/W)

    ucnbvreal1000.0D0

    cost of nuclear building ventilation ($/m3)

    ucoamrealNone

    annual cost of operation and maintenance (M$/year/1200MW**0.5)

    ucpensrealNone

    penetration shield cost ($/kg)

    ucpfbrealNone

    cost of PF coil buses ($/kA-m)

    ucpfbkrealNone

    cost of PF coil DC breakers ($/MVA**0.7)

    ucpfbsrealNone

    cost of PF burn power supplies ($/kW**0.7)

    ucpfcbrealNone

    cost of PF coil AC breakers ($/circuit)

    ucpfdr1realNone

    cost factor for dump resistors ($/MJ)

    ucpficrealNone

    cost of PF instrumentation and control ($/channel)

    ucpfpsrealNone

    cost of PF coil pulsed power supplies ($/MVA)

    ucphxreal15.0D0

    primary heat transport cost ($/W**exphts)

    ucppreal48.0D0

    cost of primary power transformers ($/kVA**0.9)

    ucrbrealNone

    cost of reactor building (M$/m3)

    ucscrealNone

    cost of superconductor ($/kg)

    sc_mat_cost_0realNone

    cost of superconductor ($/kA m) at 6.4 T, 4.2 K

    ucshreal115.0D0

    cost of shops and warehouses (M$/m3)

    ucshldrealNone

    cost of shield structural steel ($/kg)

    ucswydreal1.84D7

    switchyard equipment costs ($)

    uctfbrrealNone

    cost of TF coil breakers ($/W**0.7)

    uctfbusrealNone

    cost of TF coil bus ($/kg)

    uctfdrreal1.75D-4

    cost of TF coil dump resistors ($/J)

    uctfgrreal5000.0D0

    additional cost of TF coil dump resistors ($/coil)

    uctficreal1.0D4

    cost of TF coil instrumentation and control ($/coil/30)

    uctfpsrealNone

    cost of TF coil power supplies ($/W**0.7)

    uctfswrealNone

    cost of TF coil slow dump switches ($/A)

    uctpmpreal1.105D5

    cost of turbomolecular pump ($)

    uctrreal370.0D0

    cost of tritium building ($/m3)

    ucturbrealNone

    cost of turbine plant equipment ($) (dependent on coolant type coolwh)

    ucvalvreal3.9D5

    vacuum system valve cost ($)

    ucvdshreal26.0D0

    vacuum duct shield cost ($/kg)

    ucviacreal1.3D6

    vacuum system instrumentation and control cost ($)

    ucwindpfrealNone

    cost of PF coil superconductor windings ($/m)

    ucwindtfrealNone

    cost of TF coil superconductor windings ($/m)

    ucwsreal460.0D0

    cost of active assembly shop ($/m3)

    ucwstrealNone

    cost of waste disposal (M$/y/1200MW)

    process_input

    Variable nameTypeInitialDescription
    nininteger10
    maxleninteger2000
    linecharacterNone
    linelenintegerNone
    linenointegerNone
    iptrintegerNone
    infileintegerNone
    outfileintegerNone
    report_changesintegerNone
    icodeintegerNone
    subscript_presentlogicalNone
    errorlogicalNone
    error_messagecharacterNone
    show_changesintegerNone
    constraints_existlogicalNone

    reinke_module

    Variable nameTypeInitialDescription
    vcritxrealNone

    error_handling

    Variable nameTypeInitialDescription
    errors_onlogicalNone
    ERROR_OKAYinteger0
    ERROR_INFOinteger1
    ERROR_WARNinteger2
    ERROR_SEVEREinteger3
    error_idintegerNone

    error_id : identifier for final message encountered

    error_statusintegerNone

    error_status : overall status flag for a run; on exit:

    • 0 all okay
    • 1 informational messages have been encountered
    • 2 warning (non-fatal) messages have been encountered
    • 3 severe (fatal) errors have occurred

    INT_DEFAULTinteger-999999
    FLT_DEFAULTrealreal(INT_DEFAULT, kind(1.0D0))
    idiagsintegerNone
    fdiagsrealNone
    error_headtypeNone
    error_tailtypeNone
    error_typetypeNone

    rebco_variables

    Variable nameTypeInitialDescription
    rebco_thicknessrealNone

    thickness of REBCO layer in tape (m) (iteration variable 138)

    copper_thickrealNone

    thickness of copper layer in tape (m) (iteration variable 139)

    hastelloy_thicknessrealNone

    thickness of Hastelloy layer in tape (m)

    tape_widthrealNone

    Mean width of tape (m)

    tape_thicknessrealNone

    thickness of tape, inc. all layers (hts, copper, substrate, etc.) (m)

    croco_odrealNone

    Outer diameter of CroCo strand (m)

    croco_idrealNone

    Inner diameter of CroCo copper tube (m)

    croco_thickrealNone

    Thickness of CroCo copper tube (m) (iteration variable 158)

    copper_rrrrealNone

    residual resistivity ratio copper in TF superconducting cable

    copperA_m2realNone

    TF coil current / copper area (A/m2)

    coppera_m2_maxrealNone

    Maximum TF coil current / copper area (A/m2)

    f_coppera_m2realNone

    f-value for constraint 75: TF coil current / copper area < copperA_m2_max

    copperaoh_m2realNone

    CS coil current / copper area (A/m2) (sweep variable 61)

    copperaoh_m2_maxrealNone

    Maximum CS coil current / copper area (A/m2)

    f_copperaoh_m2realNone

    f-value for constraint 88: CS coil current / copper area < copperA_m2_max

    stack_thicknessrealNone
    tapesrealNone
    rebco_arearealNone
    copper_arearealNone
    hastelloy_arearealNone
    solder_arearealNone
    croco_arearealNone

    reinke_variables

    Variable nameTypeInitialDescription
    impvardivintegerNone

    Index of impurity to be iterated for Reinke divertor detachment criterion

    lhatrealNone

    Connection length factor L|| = lhat qstar R for Reinke criterion, default value from Post et al. 1995 J. Nucl. Mat. 220-2 1014

    fzminrealNone

    Minimum impurity fraction necessary for detachment. This is the impurity at the SOL/Div.

    fzactualrealNone

    Actual impurity fraction of divertor impurity (impvardiv) in the SoL (taking impurity_enrichment into account) (iteration variable 148)

    reinke_modeintegerNone

    Switch for Reinke criterion H/I mode:

    • =0 H-mode
    • =1 I-mode

    water_usage_variables

    Variable nameTypeInitialDescription
    airtemprealNone

    ambient air temperature (degrees Celsius)

    watertemprealNone

    water temperature (degrees Celsius)

    windspeedrealNone

    wind speed (m/s)

    waterdensrealNone

    density of water (kg/m3) for simplicity, set to static value applicable to water at 21 degC

    latentheatrealNone

    latent heat of vaporization (J/kg) for simplicity, set to static value applicable at 1 atm (100 kPa) air pressure

    volheatrealNone

    volumetric heat of vaporization (J/m3)

    evapratiorealNone

    evaporation ratio: ratio of the heat used to evaporate water to the total heat discharged through the tower

    evapvolrealNone

    evaporated volume of water (m3)

    energypervolrealNone

    input waste (heat) energy cooled per evaporated volume (J/m3)

    volperenergyrealNone

    volume evaporated by units of heat energy (m3/MJ)

    waterusetowerrealNone

    total volume of water used in cooling tower (m3)

    wateruserecircrealNone

    total volume of water used in recirculating system (m3)

    wateruseonethrurealNone

    total volume of water used in once-through system (m3)

    structure_variables

    Variable nameTypeInitialDescription
    aintmassrealNone

    intercoil structure mass (kg)

    clgsmassrealNone

    gravity support structure for TF coil, PF coil and intercoil support systems (kg)

    coldmassrealNone

    total mass of components at cryogenic temperatures (kg)

    fncmassrealNone

    PF coil outer support fence mass (kg)

    gsmassrealNone

    reactor core gravity support mass (kg)

    fwbs_variables

    Variable nameTypeInitialDescription
    bktliferealNone

    Full power blanket lifetime (years)

    bktlife_calrealNone

    Calendar year blanket lifetime (years)

    coolmassrealNone

    mass of water coolant (in shield, blanket, first wall, divertor) [kg]

    vvmassrealNone

    vacuum vessel mass [kg]

    denstlrealNone

    density of steel [kg m^-3]

    denwrealNone

    density of tungsten [kg m^-3]

    denwcrealNone

    density of tungsten carbide [kg m^-3]

    dewmkgrealNone

    total mass of vacuum vessel + cryostat [kg] (calculated if blktmodel>0)

    emultrealNone

    energy multiplication in blanket and shield

    emultmwrealNone

    power due to energy multiplication in blanket and shield [MW]

    fblssrealNone

    KIT blanket model: steel fraction of breeding zone

    fdivrealNone

    Solid angle fraction taken by one divertor

    fhcdrealNone

    area fraction covered by heating/current drive apparatus plus diagnostics

    fholerealNone

    area fraction taken up by other holes (IFE)

    fwbsshapeintegerNone

    switch for first wall, blanket, shield and vacuum vessel shape:

    • =1 D-shaped (cylinder inboard + ellipse outboard)
    • =2 defined by two ellipses
    fwliferealNone

    first wall full-power year lifetime (y)

    fwmassrealNone

    first wall mass [kg]

    fw_armour_massrealNone

    first wall armour mass [kg]

    fw_armour_thicknessrealNone

    first wall armour thickness [m]

    fw_armour_volrealNone

    first wall armour volume [m^3]

    iblanketintegerNone

    switch for blanket model:

    • =1 CCFE HCPB model
    • =2 KIT HCPB model # REMOVED, no longer usable
    • =3 CCFE HCPB model with Tritium Breeding Ratio calculation
    • =4 KIT HCLL model # REMOVED, no longer usable
    • =5 DCLL model - no nutronics model included (in development) please check/choose values for 'dual-coolant blanket' fractions (provided in this file). - please use primary_pumping = 0 or 1.
    iblnkithintegerNone

    switch for inboard blanket:

    • =0 No inboard blanket (blnkith=0.0)
    • =1 Inboard blanket present
    inuclearintegerNone

    switch for nuclear heating in the coils:

    • =0 Frances Fox model (default)
    • =1 Fixed by user (qnuc)
    qnucrealNone

    nuclear heating in the coils (W) (inuclear=1)

    li6enrichrealNone

    lithium-6 enrichment of breeding material (%)

    pnucblktrealNone

    nuclear heating in the blanket [MW]

    pnuc_cprealNone

    Total nuclear heating in the ST centrepost [MW]

    pnuc_cp_shrealNone

    Neutronic shield nuclear heating in the ST centrepost [MW]

    pnuc_cp_tfrealNone

    TF neutronic nuclear heating in the ST centrepost [MW]

    pnucdivrealNone

    nuclear heating in the divertor [MW]

    pnucfwrealNone

    nuclear heating in the first wall [MW]

    pnuchcdrealNone

    nuclear heating in the HCD apparatus and diagnostics [MW]

    pnuclossrealNone

    nuclear heating lost via holes [MW]

    pnucvvplusrealNone

    nuclear heating to vacuum vessel and beyond [MW]

    pnucshldrealNone

    nuclear heating in the shield [MW]

    whtblktrealNone

    mass of blanket [kg]

    whtblssrealNone

    mass of blanket - steel part [kg]

    armour_fw_bl_massrealNone

    Total mass of armour, first wall and blanket [kg]

    breeder_frealNone

    Volume ratio: Li4SiO4/(Be12Ti+Li4SiO4) (iteration variable 108)

    breeder_multiplierrealNone

    combined breeder/multipler fraction of blanket by volume

    vfcblktrealNone

    He coolant fraction of blanket by volume (iblanket= 1,3 (CCFE HCPB))

    vfpblktrealNone

    He purge gas fraction of blanket by volume (iblanket= 1,3 (CCFE HCPB))

    whtblli4sio4realNone

    mass of lithium orthosilicate in blanket [kg] (iblanket=1,3 (CCFE HCPB))

    whtbltibe12realNone

    mass of titanium beryllide in blanket [kg] (iblanket=1,3 (CCFE HCPB))

    neut_flux_cprealNone

    Centrepost TF fast neutron flux (E > 0.1 MeV) [m^(-2).^(-1)] This variable is only calculated for superconducting (i_tf_sup = 1 ) spherical tokamal magnet designs (itart = 0)

    f_neut_shieldrealNone

    Fraction of nuclear power shielded before the CP magnet (ST) ( neut_absorb = -1 --> a fit on simplified MCNP neutronic calculation is used assuming water cooled (13%) tungesten carbyde )

    vffwirealNone

    Inboard/outboard FW coolant void fraction

    vffworealNone

    Inboard/outboard FW coolant void fraction

    psurffwirealNone

    Surface heat flux on first wall [MW] (sum = pradfw)

    psurffworealNone

    Surface heat flux on first wall [MW] (sum = pradfw)

    volfwrealNone

    First wall volume [m3]

    fblss_ccferealNone

    Fractions of blanket by volume: steel, lithium orthosilicate, titanium beryllide

    fblli2sio4realNone

    Fractions of blanket by volume: steel, lithium orthosilicate, titanium beryllide

    fbltibe12realNone

    Fractions of blanket by volume: steel, lithium orthosilicate, titanium beryllide

    breedmatintegerNone

    breeder material switch (iblanket=2 (KIT HCPB)):

    • =1 Lithium orthosilicate
    • =2 Lithium methatitanate
    • =3 Lithium zirconate
    densbreedrealNone

    density of breeder material [kg m^-3] (iblanket=2 (KIT HCPB))

    fblberealNone

    beryllium fraction of blanket by volume (if iblanket=2, is Be fraction of breeding zone)

    fblbreedrealNone

    breeder fraction of blanket breeding zone by volume (iblanket=2 (KIT HCPB))

    fblhebmirealNone

    helium fraction of inboard blanket box manifold by volume (iblanket=2 (KIT HCPB))

    fblhebmorealNone

    helium fraction of outboard blanket box manifold by volume (iblanket=2 (KIT HCPB))

    fblhebpirealNone

    helium fraction of inboard blanket back plate by volume (iblanket=2 (KIT HCPB))

    fblhebporealNone

    helium fraction of outboard blanket back plate by volume (iblanket=2 (KIT HCPB))

    hcdportsizeintegerNone

    switch for size of heating/current drive ports (iblanket=2 (KIT HCPB)):

    • =1 'small'
    • =2 'large'
    nflutfrealNone

    peak fast neutron fluence on TF coil superconductor [n m^-2] (iblanket=2 (KIT HCPB))

    npdivintegerNone

    number of divertor ports (iblanket=2 (KIT HCPB))

    nphcdinintegerNone

    number of inboard ports for heating/current drive (iblanket=2 (KIT HCPB))

    nphcdoutintegerNone

    number of outboard ports for heating/current drive (iblanket=2 (KIT HCPB))

    tbrrealNone

    tritium breeding ratio (iblanket=2,3 (KIT HCPB/HCLL))

    tritpraterealNone

    tritium production rate [g day^-1] (iblanket=2 (KIT HCPB))

    wallpfrealNone

    neutron wall load peaking factor (iblanket=2 (KIT HCPB))

    whtblbreedrealNone

    mass of blanket - breeder part [kg] (iblanket=2 (KIT HCPB))

    whtblberealNone

    mass of blanket - beryllium part [kg]

    iblanket_thicknessintegerNone

    Blanket thickness switch (Do not set blnkith, blnkoth, fwith or fwoth when iblanket=3):

    • =1 thin 0.53 m inboard, 0.91 m outboard
    • =2 medium 0.64 m inboard, 1.11 m outboard
    • =3 thick 0.75 m inboard, 1.30 m outboard
    primary_pumpingintegerNone

    Switch for pumping power for primary coolant (mechanical power only and peak first wall temperature is only calculated if primary_pumping=2):

    • =0 User sets pump power directly (htpmw_blkt, htpmw_fw, htpmw_div, htpmw_shld)
    • =1 User sets pump power as a fraction of thermal power (fpumpblkt, fpumpfw, fpumpdiv, fpumpshld)
    • =2 Mechanical pumping power is calculated
    • =3 Mechanical pumping power is calculated using specified pressure drop
    i_shield_matintegerNone

    Switch for shield material - currently only applied in costing routines cost_model = 2

    • =0 Tungsten (default)
    • =1 Tungsten carbide
    secondary_cycleintegerNone

    Switch for power conversion cycle:

    • =0 Set efficiency for chosen blanket, from detailed models (divertor heat not used)
    • =1 Set efficiency for chosen blanket, from detailed models (divertor heat used)
    • =2 user input thermal-electric efficiency (etath)
    • =3 steam Rankine cycle
    • =4 supercritical CO2 cycle
    secondary_cycle_liqintegerNone

    Switch for power conversion cycle for the liquid breeder component of the blanket:

    • =2 user input thermal-electric efficiency (etath)
    • =4 supercritical CO2 cycle
    coolwhintegerNone

    Switch for blanket coolant (set via blkttype):

    • =1 helium
    • =2 pressurized water
    afwirealNone

    inner radius of inboard first wall/blanket coolant channels (stellarator only) [m]

    afworealNone

    inner radius of outboard first wall/blanket coolant channels (stellarator only) [m]

    fwcoolantcharacterNone

    switch for first wall coolant (can be different from blanket coolant):

    • 'helium'
    • 'water'
    fw_wallrealNone

    wall thickness of first wall coolant channels [m]

    afwrealNone

    radius of first wall cooling channels [m]

    pitchrealNone

    pitch of first wall cooling channels [m]

    fwinletrealNone

    inlet temperature of first wall coolant [K]

    fwoutletrealNone

    outlet temperature of first wall coolant [K]

    fwpressurerealNone

    first wall coolant pressure [Pa] (secondary_cycle>1)

    tpeakrealNone

    peak first wall temperature [K]

    roughnessrealNone

    first wall channel roughness epsilon [m]

    fw_channel_lengthrealNone

    Length of a single first wall channel (all in parallel) [m] (iteration variable 114, useful for constraint equation 39)

    peaking_factorrealNone

    peaking factor for first wall heat loads. (Applied separately to inboard and outboard loads. Applies to both neutron and surface loads. Only used to calculate peak temperature - not the coolant flow rate.)

    blpressurerealNone

    blanket coolant pressure [Pa] (secondary_cycle>1)

    inlet_temprealNone

    inlet temperature of blanket coolant [K] (secondary_cycle>1)

    outlet_temprealNone

    Outlet temperature of blanket coolant [K] (secondary_cycle>1)

    • input if coolwh=1 (helium)
    • calculated if coolwh=2 (water)
    coolprealNone

    blanket coolant pressure [Pa] (stellarator only)

    nblktmodpointegerNone

    number of outboard blanket modules in poloidal direction (secondary_cycle>1)

    nblktmodpiintegerNone

    number of inboard blanket modules in poloidal direction (secondary_cycle>1)

    nblktmodtointegerNone

    number of outboard blanket modules in toroidal direction (secondary_cycle>1)

    nblktmodtiintegerNone

    number of inboard blanket modules in toroidal direction (secondary_cycle>1)

    tfwmatmaxrealNone

    maximum temperature of first wall material [K] (secondary_cycle>1)

    fw_th_conductivityrealNone

    thermal conductivity of first wall material at 293 K (W/m/K) (Temperature dependence is as for unirradiated Eurofer)

    fvoldwrealNone

    area coverage factor for vacuum vessel volume

    fvolsirealNone

    area coverage factor for inboard shield volume

    fvolsorealNone

    area coverage factor for outboard shield volume

    fwclfrrealNone

    first wall coolant fraction (calculated if lpulse=1 or ipowerflow=1)

    praddivrealNone

    Radiation power incident on the divertor (MW)

    pradfwrealNone

    Radiation power incident on the first wall (MW)

    pradhcdrealNone

    Radiation power incident on the heating and current drive system (MW)

    pradlossrealNone

    Radiation power lost through holes (eventually hits shield) (MW) Only used for stellarator

    ptfnucrealNone

    nuclear heating in the TF coil (MW)

    ptfnucpm3realNone

    nuclear heating in the TF coil (MW/m3) (blktmodel>0)

    rdewexrealNone

    cryostat radius [m]

    zdewexrealNone

    cryostat height [m]

    rpf2dewarrealNone

    radial distance between outer edge of largest (ipfloc=3) PF coil (or stellarator modular coil) and cryostat [m]

    vdewexrealNone

    cryostat volume [m^3]

    vdewinrealNone

    vacuum vessel volume [m^3]

    vfshldrealNone

    coolant void fraction in shield

    volblktrealNone

    volume of blanket [m^3]

    volblktirealNone

    volume of inboard blanket [m^3]

    volblktorealNone

    volume of outboard blanket [m^3]

    volshldrealNone

    volume of shield [m^3]

    whtshldrealNone

    mass of shield [kg]

    wpenshldrealNone

    mass of the penetration shield [kg]

    wtshldirealNone

    mass of inboard shield [kg]

    wtshldorealNone

    mass of outboard shield [kg]

    irefpropintegerNone

    Switch to use REFPROP routines (stellarator only)

    fbllirealNone

    lithium fraction of blanket by volume (stellarator only)

    fblli2orealNone

    lithium oxide fraction of blanket by volume (stellarator only)

    fbllipbrealNone

    lithium lead fraction of blanket by volume (stellarator only)

    fblvdrealNone

    vanadium fraction of blanket by volume (stellarator only)

    wtblli2orealNone

    mass of blanket - Li_2O part [kg]

    wtbllipbrealNone

    mass of blanket - Li-Pb part [kg]

    whtblvdrealNone

    mass of blanket - vanadium part [kg]

    whtbllirealNone

    mass of blanket - lithium part [kg]

    vfblktrealNone

    coolant void fraction in blanket.

    blktmodelintegerNone

    switch for blanket/tritium breeding model (see iblanket):

    • =0 original simple model
    • =1 KIT model based on a helium-cooled pebble-bed blanket (HCPB) reference design
    declblktrealNone

    neutron power deposition decay length of blanket structural material [m] (stellarators only)

    declfwrealNone

    neutron power deposition decay length of first wall structural material [m] (stellarators only)

    declshldrealNone

    neutron power deposition decay length of shield structural material [m] (stellarators only)

    blkttypeintegerNone

    Switch for blanket type:

    • =1 WCLL;
    • =2 HCLL; efficiency taken from M. Kovari 2016 "PROCESS": A systems code for fusion power plants - Part 2: Engineering https://www.sciencedirect.com/science/article/pii/S0920379616300072 Feedheat & reheat cycle assumed
    • =3 HCPB; efficiency taken from M. Kovari 2016 "PROCESS": A systems code for fusion power plants - Part 2: Engineering https://www.sciencedirect.com/science/article/pii/S0920379616300072 Feedheat & reheat cycle assumed
    etaisorealNone

    isentropic efficiency of FW and blanket coolant pumps

    etahtprealNone

    electrical efficiency of primary coolant pumps


    BLANKET REFACTOR For DCLL, but to be used by all mods that share blanket library after testing. Thermodynamic Model for primary_pumping == 2


    ipumpintegerNone

    Switch for whether the FW and BB are on the same pump system i.e. do they have the same primary coolant or not - =0 FW and BB have the same primary coolant, flow = FWin->FWout->BBin->BBout - =1 FW and BB have the different primary coolant and are on different pump systems

    i_bb_liqintegerNone

    Switch for Liquid Metal Breeder Material - =0 PbLi - =1 Li

    icooldualintegerNone

    Switch to specify whether breeding blanket is single-cooled or dual-coolant. - =0 Single coolant used for FW and Blanket (H2O or He). Solid Breeder. - =1 Single coolant used for FW and Blanket (H2O or He). Liquid metal breeder circulted for tritium extraction. - =2 Dual coolant: primary coolant (H2O or He) for FW and blanket structure; secondary coolant is self-cooled liquid metal breeder.

    ifciintegerNone

    Switch for Flow Channel Insert (FCI) type if liquid metal breeder blanket. - =0 Thin conducting walls, default electrical conductivity (bz_channel_conduct_liq) is Eurofer - =1 Insulating Material, assumed perfect electrical insulator, default density (den_ceramic) is for SiC - =2 Insulating Material, electrical conductivity (bz_channel_conduct_liq) is input (default Eurofer), default density (den_ceramic) is for SiC

    imsintegerNone

    Switch for Multi Module Segment (MMS) or Single Modle Segment (SMS) - =0 MMS - =1 SMS

    n_liq_recircintegerNone

    Number of liquid metal breeder recirculations per day, for use with icooldual=1

    r_f_liq_ibrealNone

    Radial fraction of BZ liquid channels

    r_f_liq_obrealNone

    Radial fraction of BZ liquid channels

    w_f_liq_ibrealNone

    Toroidal fraction of BZ liquid channels

    w_f_liq_obrealNone

    Toroidal fraction of BZ liquid channels

    den_ceramicrealNone

    FCI material density

    th_wall_secondaryrealNone

    Liquid metal coolant/breeder wall thickness thin conductor or FCI [m]

    bz_channel_conduct_liqrealNone

    Liquid metal coolant/breeder thin conductor or FCI wall conductance [A V^-1 m^-1]

    a_bz_liqrealNone

    Toroidal width of the rectangular cooling channel [m] for long poloidal sections of blanket breeding zone

    b_bz_liqrealNone

    Radial width of the rectangular cooling channel [m] for long poloidal sections of blanket breeding zone

    nopolintegerNone

    Number of poloidal sections in a liquid metal breeder/coolant channel for module/segment

    nopipesintegerNone

    Number of Liquid metal breeder/coolant channels per module/segment

    den_liqrealNone

    Liquid metal breeder/coolant density [kg m^-3]

    wht_liqrealNone

    Liquid metal

    wht_liq_ibrealNone

    Liquid metal

    wht_liq_obrealNone

    Liquid metal

    specific_heat_liqrealNone

    Liquid metal breeder/coolant specific heat [J kg^-1 K^-1]

    thermal_conductivity_liqrealNone

    Liquid metal breeder/coolant thermal conductivity [W m^-1 K^-1]

    dynamic_viscosity_liqrealNone

    Liquid metal breeder/coolant dynamic viscosity [Pa s]

    electrical_conductivity_liqrealNone

    Liquid metal breeder/coolant electrical conductivity [Ohm m]

    hartmann_liqrealNone

    Hartmann number

    b_mag_blktrealNone

    Toroidal Magnetic feild strength for IB/OB blanket [T]

    etaiso_liqrealNone

    Isentropic efficiency of blanket liquid breeder/coolant pumps

    blpressure_liqrealNone

    blanket liquid metal breeder/coolant pressure [Pa]

    inlet_temp_liqrealNone

    Inlet (scan var 68) and Outlet (scan var 69) temperature of the liquid breeder/coolant [K]

    outlet_temp_liqrealNone

    Inlet (scan var 68) and Outlet (scan var 69) temperature of the liquid breeder/coolant [K]

    rhof_fwrealNone

    Density of the FW primary coolant

    visc_fwrealNone

    Viscosity of the FW primary coolant

    rhof_blrealNone

    Density of the blanket primary coolant

    visc_blrealNone

    Viscosity of the blanket primary coolant

    cp_fwrealNone

    Spesific heat for FW and blanket primary coolant(s)

    cv_fwrealNone

    Spesific heat for FW and blanket primary coolant(s)

    cp_blrealNone

    Spesific heat for FW and blanket primary coolant(s)

    cv_blrealNone

    Spesific heat for FW and blanket primary coolant(s)

    f_nuc_pow_bz_structrealNone

    For a dual-coolant blanket, fraction of BZ power cooled by primary coolant

    f_nuc_pow_bz_liqrealNone

    For a dual-coolant blanket, fraction of BZ self-cooled power (secondary coolant)

    pnuc_fw_ratio_dcllrealNone

    For a dual-coolant blanket, ratio of FW/Blanket nuclear power as fraction of total

    pnuc_blkt_ratio_dcllrealNone

    For a dual-coolant blanket, ratio of FW/Blanket nuclear power as fraction of total

    bzfllengi_n_radintegerNone

    Number of radial and poloidal sections that make up the total primary coolant flow length in a blanket module (IB and OB)

    bzfllengi_n_polintegerNone

    Number of radial and poloidal sections that make up the total primary coolant flow length in a blanket module (IB and OB)

    bzfllengo_n_radintegerNone

    Number of radial and poloidal sections that make up the total primary coolant flow length in a blanket module (IB and OB)

    bzfllengo_n_polintegerNone

    Number of radial and poloidal sections that make up the total primary coolant flow length in a blanket module (IB and OB)

    bzfllengi_n_rad_liqintegerNone

    Number of radial and poloidal sections that make up the total secondary coolant/breeder flow length in a blanket module (IB and OB)

    bzfllengi_n_pol_liqintegerNone

    Number of radial and poloidal sections that make up the total secondary coolant/breeder flow length in a blanket module (IB and OB)

    bzfllengo_n_rad_liqintegerNone

    Number of radial and poloidal sections that make up the total secondary coolant/breeder flow length in a blanket module (IB and OB)

    bzfllengo_n_pol_liqintegerNone

    Number of radial and poloidal sections that make up the total secondary coolant/breeder flow length in a blanket module (IB and OB)

    constraint_variables

    Variable nameTypeInitialDescription
    auxminrealNone

    minimum auxiliary power (MW) (constraint equation 40)

    betpmxrealNone

    maximum poloidal beta (constraint equation 48)

    bigqminrealNone

    minimum fusion gain Q (constraint equation 28)

    bmxlimrealNone

    maximum peak toroidal field (T) (constraint equation 25)

    fauxmnrealNone

    f-value for minimum auxiliary power (constraint equation 40, iteration variable 64)

    fbetarealNone

    f-value for epsilon beta-poloidal (constraint equation 6, iteration variable 8)

    fbetaprealNone

    f-value for poloidal beta (constraint equation 48, iteration variable 79)

    fbetatryrealNone

    f-value for beta limit (constraint equation 24, iteration variable 36)

    fbetatry_lowerrealNone

    f-value for (lower) beta limit (constraint equation 84, iteration variable 173)

    fcpttfrealNone

    f-value for TF coil current per turn upper limit (constraint equation 77, iteration variable 146)

    fcwrrealNone

    f-value for conducting wall radius / rminor limit (constraint equation 23, iteration variable 104)

    fdenerealNone

    f-value for density limit (constraint equation 5, iteration variable 9) (invalid if ipedestal=3)

    fdivcolrealNone

    f-value for divertor collisionality (constraint equation 22, iteration variable 34)

    fdtmprealNone

    f-value for first wall coolant temperature rise (constraint equation 38, iteration variable 62)

    fecrh_ignitionrealNone

    f-value for ecrh ignition constraint (constraint equation 91, iteration variable 168)

    fflutfrealNone

    f-value for neutron fluence on TF coil (constraint equation 53, iteration variable 92)

    ffuspowrealNone

    f-value for maximum fusion power (constraint equation 9, iteration variable 26)

    fgamcdrealNone

    f-value for current drive gamma (constraint equation 37, iteration variable 40)

    fhldivrealNone

    f-value for divertor heat load (constraint equation 18, iteration variable 27)

    fiooicrealNone

    f-value for TF coil operating current / critical current ratio (constraint equation 33, iteration variable 50)

    fipirrealNone

    f-value for Ip/Irod upper limit constraint equation icc = 46 iteration variable ixc = 72

    fjohcrealNone

    f-value for central solenoid current at end-of-flattop (constraint equation 26, iteration variable 38)

    fjohc0realNone

    f-value for central solenoid current at beginning of pulse (constraint equation 27, iteration variable 39)

    fjprotrealNone

    f-value for TF coil winding pack current density (constraint equation 35, iteration variable 53)

    flhthreshrealNone

    f-value for L-H power threshold (constraint equation 15, iteration variable 103)

    fmvarealNone

    f-value for maximum MVA (constraint equation 19, iteration variable 30)

    fnbshinefrealNone

    f-value for maximum neutral beam shine-through fraction (constraint equation 59, iteration variable 105)

    fncyclerealNone

    f-value for minimum CS coil stress load cycles (constraint equation 90, iteration variable 167)

    fneseprealNone

    f-value for Eich critical separatrix density (constraint equation 76, iteration variable 144)

    foh_stressrealNone

    f-value for Tresca yield criterion in Central Solenoid (constraint equation 72, iteration variable 123)

    fpeakbrealNone

    f-value for maximum toroidal field (constraint equation 25, iteration variable 35)

    fpinjrealNone

    f-value for injection power (constraint equation 30, iteration variable 46)

    fpnetelrealNone

    f-value for net electric power (constraint equation 16, iteration variable 25)

    fportszrealNone

    f-value for neutral beam tangency radius limit (constraint equation 20, iteration variable 33)

    fpsepbqarrealNone

    f-value for maximum Psep*Bt/qAR limit (constraint equation 68, iteration variable 117)

    fpseprrealNone

    f-value for maximum Psep/R limit (constraint equation 56, iteration variable 97)

    fptemprealNone

    f-value for peak centrepost temperature (constraint equation 44, iteration variable 68)

    fptfnucrealNone

    f-value for maximum TF coil nuclear heating (constraint equation 54, iteration variable 95)

    fqrealNone

    f-value for edge safety factor (constraint equation 45, iteration variable 71)

    fqvalrealNone

    f-value for Q (constraint equation 28, iteration variable 45)

    fradpwrrealNone

    f-value for core radiation power limit (constraint equation 17, iteration variable 28)

    fradwallrealNone

    f-value for upper limit on radiation wall load (constr. equ. 67, iteration variable 116)

    freinkerealNone

    f-value for Reinke detachment criterion (constr. equ. 78, iteration variable 147)

    frminorrealNone

    f-value for minor radius limit (constraint equation 21, iteration variable 32)

    fstrcaserealNone

    f-value for maximum TF coil case Tresca yield criterion (constraint equation 31, iteration variable 48)

    fstrcondrealNone

    f-value for maxiumum TF coil conduit Tresca yield criterion (constraint equation 32, iteration variable 49)

    fstr_wprealNone

    f-value for maxiumum TF coil strain absolute value (constraint equation 88, iteration variable 165)

    fmaxvvstressrealNone

    f-value for maximum permitted stress of the VV (constraint equation 65, iteration variable 113)

    ftbrrealNone

    f-value for minimum tritium breeding ratio (constraint equation 52, iteration variable 89)

    ftburnrealNone

    f-value for minimum burn time (constraint equation 13, iteration variable 21)

    ftcyclrealNone

    f-value for cycle time (constraint equation 42, iteration variable 67)

    ftmargohrealNone

    f-value for central solenoid temperature margin (constraint equation 60, iteration variable 106)

    ftmargtfrealNone

    f-value for TF coil temperature margin (constraint equation 36, iteration variable 54)

    ftohsrealNone

    f-value for plasma current ramp-up time (constraint equation 41, iteration variable 66)

    ftpeakrealNone

    f-value for first wall peak temperature (constraint equation 39, iteration variable 63)

    fvdumprealNone

    f-value for dump voltage (constraint equation 34, iteration variable 51)

    fvsrealNone

    f-value for flux-swing (V-s) requirement (STEADY STATE) (constraint equation 12, iteration variable 15)

    fvvherealNone

    f-value for vacuum vessel He concentration limit (iblanket = 2) (constraint equation 55, iteration variable 96)

    fwalldrealNone

    f-value for maximum wall load (constraint equation 8, iteration variable 14)

    fzeffmaxrealNone

    f-value for maximum zeff (constraint equation 64, iteration variable 112)

    gammaxrealNone

    maximum current drive gamma (constraint equation 37)

    maxradwallloadrealNone

    Maximum permitted radiation wall load (MW/m^2) (constraint equation 67)

    mvalimrealNone

    maximum MVA limit (constraint equation 19)

    nbshinefmaxrealNone

    maximum neutral beam shine-through fraction (constraint equation 59)

    nflutfmaxrealNone

    max fast neutron fluence on TF coil (n/m2) (blktmodel>0) (constraint equation 53) Also used for demontable magnets (itart = 1) and superconducting coils (i_tf_sup = 1) To set the CP lifetime (constraint equation 85)

    pdivtlimrealNone

    Minimum pdivt [MW] (constraint equation 80)

    peakfactradrealNone

    peaking factor for radiation wall load (constraint equation 67)

    peakradwallloadrealNone

    Peak radiation wall load (MW/m^2) (constraint equation 67)

    pnetelinrealNone

    required net electric power (MW) (constraint equation 16)

    powfmaxrealNone

    maximum fusion power (MW) (constraint equation 9)

    psepbqarmaxrealNone

    maximum ratio of Psep*Bt/qAR (MWT/m) (constraint equation 68)

    pseprmaxrealNone

    maximum ratio of power crossing the separatrix to plasma major radius (Psep/R) (MW/m) (constraint equation 56)

    ptfnucmaxrealNone

    maximum nuclear heating in TF coil (MW/m3) (constraint equation 54)

    tbrminrealNone

    minimum tritium breeding ratio (constraint equation 52)

    tbrnmnrealNone

    minimum burn time (s) (KE - no longer itv., see issue #706)

    tcycmnrealNone

    minimum cycle time (s) (constraint equation 42)

    tohsmnrealNone

    minimum plasma current ramp-up time (s) (constraint equation 41)

    vvhealwrealNone

    allowed maximum helium concentration in vacuum vessel at end of plant life (appm) (iblanket =2) (constraint equation 55)

    walalwrealNone

    allowable neutron wall-load (MW/m2) (constraint equation 8)

    taulimitrealNone

    Lower limit on taup/taueff the ratio of alpha particle to energy confinement times (constraint equation 62)

    ftaulimitrealNone

    f-value for lower limit on taup/taueff the ratio of alpha particle to energy confinement times (constraint equation 62, iteration variable 110)

    fniterpumprealNone

    f-value for constraint that number of pumps < tfno (constraint equation 63, iteration variable 111)

    zeffmaxrealNone

    maximum value for Zeff (constraint equation 64)

    fpoloidalpowerrealNone

    f-value for constraint on rate of change of energy in poloidal field (constraint equation 66, iteration variable 115)

    fpseprealNone

    f-value to ensure separatrix power is less than value from Kallenbach divertor (Not required as constraint 69 is an equality)

    fcqtrealNone

    TF coil quench temparature remains below tmax_croco (constraint equation 74, iteration variable 141)

    CS_fatigue_variables

    Variable nameTypeInitialDescription
    residual_sig_hooprealNone

    residual hoop stress in strucutal material (Pa)

    n_cyclerealNone

    Allowable number of cycles for CS stress model

    n_cycle_minrealNone

    Minimum llowable number of cycles for CS stress model

    t_crack_radialrealNone

    Initial depth of crack in thickness of conduit (m)

    t_crack_verticalrealNone

    Inital vertical crack size (m)

    t_structural_radialrealNone

    Thickness of CS conductor conduit (m)

    t_structural_verticalrealNone

    Vertical thickness of CS conductor conduit (m)

    bkt_life_csfrealNone

    Switch to pass bkt_life cycles to n_cycle_min

    sf_vertical_crackrealNone

    Safety factor for vertical crack size (-)

    sf_radial_crackrealNone

    Safety factor for radial crack size (-)

    sf_fast_fracturerealNone

    safety factor for stress intensity factor (-)

    paris_coefficientrealNone

    Paris equation material coefficient (-)

    paris_power_lawrealNone

    Paris equation material power law (-)

    walker_coefficientrealNone

    walker coefficent (-)

    fracture_toughnessrealNone

    fracture toughness (MPa m^1/2)

    pf_power_variables

    Variable nameTypeInitialDescription
    acptmaxrealNone

    average of currents in PF circuits (kA)

    ensxpfmrealNone

    maximum stored energy in the PF circuits (MJ)

    iscenrintegerNone

    Switch for PF coil energy storage option:

    • =1 all power from MGF (motor-generator flywheel) units
    • =2 all pulsed power from line
    • =3 PF power from MGF, heating from line
    pfcktsrealNone

    number of PF coil circuits

    spfbuslrealNone

    total PF coil circuit bus length (m)

    spsmvarealNone

    sum of PF power supply ratings (MVA)

    srcktpmrealNone

    sum of resistive PF coil power (kW)

    vpfskvrealNone

    PF coil voltage (kV)

    peakpoloidalpowerrealNone

    Peak absolute rate of change of stored energy in poloidal field (MW)

    maxpoloidalpowerrealNone

    Maximum permitted absolute rate of change of stored energy in poloidal field (MW)

    poloidalpowerrealNone

    Poloidal power usage at time t (MW)

    define_iteration_variables

    Variable nameTypeInitialDescription
    DUMMYrealNone

    tfcoil_variables

    Variable nameTypeInitialDescription
    acasetfrealNone

    external case area per coil (inboard leg) (m2)

    acasetforealNone

    external case area per coil (outboard leg) (m2)

    acndttfrealNone

    area of the cable conduit (m2)

    acondrealNone

    Winding pack conductor area [m2] Does not include the area of voids and central helium channel

    acstfrealNone

    Cable space area (per turn) [m2] Includes the area of voids and central helium channel

    insulation_arearealNone

    single turn insulation area (m2)

    aiwprealNone

    winding pack turn insulation area per coil (m2)

    sig_tf_case_maxrealNone

    Allowable maximum shear stress (Tresca criterion) in TF coil case (Pa)

    sig_tf_wp_maxrealNone

    Allowable maximum shear stress (Tresca criterion) in TF coil conduit (Pa)

    Allowable Tresca stress in TF coil structural material (Pa)

    arealegrealNone

    outboard TF leg area (m2)

    aswprealNone

    winding pack structure area (m2)

    avwprealNone

    winding pack void (He coolant) area (m2)

    awphecrealNone

    winding pack He coil area (m2)

    bcritscrealNone

    upper critical field (T) for Nb3Sn superconductor at zero temperature and strain (i_tf_sc_mat=4, =bc20m)

    bmaxtfrealNone

    mean peak field at TF coil (T)

    bmaxtfrprealNone

    peak field at TF conductor with ripple (T)

    casestrrealNone

    case strain

    casthirealNone

    inboard TF coil case plasma side thickness (m) (calculated for stellarators)

    casthi_fractionrealNone

    inboard TF coil case plasma side thickness as a fraction of tfcth

    casthi_is_fractionlogicalNone

    logical switch to make casthi a fraction of TF coil thickness (casthi_fraction)

    casthsrealNone

    inboard TF coil sidewall case thickness (m) (calculated for stellarators)

    casths_fractionrealNone

    inboard TF coil sidewall case thickness as a fraction of tftort

    tfc_sidewall_is_fractionlogicalNone

    logical switch to make casths a fraction of TF coil thickness (casths_fraction)

    t_conductorrealNone

    Conductor (cable + steel conduit) area averaged dimension [m]

    t_turn_tfrealNone

    TF coil turn edge length including turn insulation [m] If the turn is not a square (i_tf_turns_integer = 1) a squared turn of equivelent size is use to calculated this quantity If the t_turn_tf is non zero, cpttf is calculated

    t_turn_tf_is_inputlogicalNone

    Boolean switch to activated when the user set the TF coil turn dimensions Not an input

    f_t_turn_tfrealNone

    f-value for TF turn edge length constraint If the turn is not a square (i_tf_turns_integer = 1) a squared turn of equivelent size is use for this constraint iteration variable ixc = 175 constraint equation icc = 86

    t_turn_tf_maxrealNone

    TF turn edge length including turn insulation upper limit [m] If the turn is not a square (i_tf_turns_integer = 1) a squared turn of equivelent size is use for this constraint constraint equation icc = 86

    t_cable_tfrealNone

    TF coil superconducting cable squared/rounded dimensions [m] If the turn is not a square (i_tf_turns_integer = 1) a squared cable of equivelent size is use to calculated this quantity If the t_cable_tf is non zero, cpttf is calculated

    t_cable_tf_is_inputlogicalNone

    Boolean switch to activated when the user set the TF coil cable dimensions Not an input

    acsrealNone

    Area of space inside conductor (m2)

    cdtflegrealNone

    TF outboard leg current density (A/m2) (resistive coils only)

    cforcerealNone

    centering force on inboard leg (per coil) (N/m)

    cplenrealNone

    length of TF coil inboard leg ('centrepost') (i_tf_sup = 1)

    cpttfrealNone

    TF coil current per turn (A). (calculated for stellarators) (calculated for integer-turn TF coils i_tf_turns_integer=1) (iteration variable 60)

    cpttf_maxrealNone

    Max TF coil current per turn [A]. (for stellarators and i_tf_turns_integer=1) (constraint equation 77)

    dcaserealNone

    density of coil case (kg/m3)

    dcondrealNone

    density of superconductor type given by i_tf_sc_mat/isumatoh/isumatpf (kg/m3)

    dcondinsrealNone

    density of conduit + ground-wall insulation (kg/m3)

    dhecoilrealNone

    diameter of central helium channel in TF winding (m)

    estotftgjrealNone

    total stored energy in the toroidal field (GJ)

    b_crit_upper_nbtirealNone

    upper critical field of GL_nbti

    t_crit_nbtirealNone

    critical temperature of GL_nbti

    max_force_densityrealNone

    Maximal (WP averaged) force density in TF coils at 1 point. (MN/m3)

    fcutfsurealNone

    copper fraction of cable conductor (TF coils) (iteration variable 59)

    fhtsrealNone

    technology adjustment factor for critical current density fit for isumat..=2 Bi-2212 superconductor, to describe the level of technology assumed (i.e. to account for stress, fatigue, radiation, AC losses, joints or manufacturing variations; 1.0 would be very optimistic)

    insstrainrealNone

    Radial strain in insulator

    i_tf_stress_modelintegerNone

    Switch for the TF coil stress model 0 : Generalized plane strain formulation, Issues #977 and #991, O(n^3) 1 : Old plane stress model (only for SC) 2 : Axisymmetric extended plane strain, Issues #1414 and #998, O(n)

    i_tf_trescaintegerNone

    Switch for TF coil conduit Tresca stress criterion: 0 : Tresca (no adjustment); 1 : Tresca with CEA adjustment factors (radial+2%, vertical+60%)

    i_tf_wp_geomintegerNone

    Switch for TF WP geometry selection 0 : Rectangular geometry 1 : Double rectangular geometry 2 : Trapezoidal geometry (constant lateral casing thickness) Default setting for backward compatibility if i_tf_turns_integer = 0 : Double rectangular if i_tf_turns_integer = 1 : Rectangular

    i_tf_case_geomintegerNone

    Switch for TF case geometry selection 0 : Circular front case (ITER design) 1 : Straight front case

    i_tf_turns_integerintegerNone

    Switch for TF coil integer/non-integer turns: 0 : non-integer turns 1 : integer turns

    i_tf_sc_matintegerNone

    Switch for superconductor material in TF coils:

    • =1 ITER Nb3Sn critical surface model with standard ITER parameters
    • =2 Bi-2212 high temperature superconductor (range of validity T < 20K, adjusted field b < 104 T, B > 6 T)
    • =3 NbTi
    • =4 ITER Nb3Sn model with user-specified parameters
    • =5 WST Nb3Sn parameterisation
    • =6 REBCO HTS tape in CroCo strand
    • =7 Durham Ginzburg-Landau critical surface model for Nb-Ti
    • =8 Durham Ginzburg-Landau critical surface model for REBCO
    • =9 Hazelton experimental data + Zhai conceptual model for REBCO
    i_tf_supintegerNone

    Switch for TF coil conductor model:

    • =0 copper
    • =1 superconductor
    • =2 Cryogenic aluminium
    i_tf_shapeintegerNone

    Switch for TF coil toroidal shape:

    • =0 Default value : Picture frame coil for TART / PROCESS D-shape for non itart
    • =1 PROCESS D-shape : parametrise with 2 arcs
    • =2 Picture frame coils
    i_tf_cond_eyoung_axialintegerNone

    Switch for the behavior of the TF coil conductor elastic axial properties

    • =0 Young's modulus is set to zero, and the conductor is not considered in the stress calculation. This corresponds to the case that the conductor is much less stiff than the conduit, or the case that the conductor is prevented (isolated) from taking axial loads.
    • =1 Elastic properties are set by user input, using the variable eyoung_cond_axial
    • =2 Elastic properties are set to reasonable defaults taking into account the superconducting material i_tf_sc_mat
    i_tf_cond_eyoung_transintegerNone

    Switch for the behavior of the elastic properties of the TF coil conductorin the transverse direction. Only active if i_tf_cond_eyoung_axial == 2

    • =0 Cable not potted in solder. Transverse Young's modulus set to zero.
    • =1 Cable potted in solder. If i_tf_cond_eyoung_axial == 2, the transverse Young's modulus of the conductor is equal to the axial, which is set to a sensible material-dependent default.
    n_pancakeintegerNone

    Number of pancakes in TF coil. Only used if i_tf_turns_integer=1

    n_layerintegerNone

    Number of layers in TF coil. Only used if i_tf_turns_integer=1

    n_rad_per_layerintegerNone

    Size of the arrays per layers storing the radial dependent stress quantities (stresses, strain displacement etc..)

    i_tf_buckingintegerNone

    Switch for TF inboard suport structure design:

    Default setting for backward compatibility - if copper resistive TF (i_tf_sup = 0) : Free standing TF without bucking structure - if Superconducting TF (i_tf_sup = 1) : Free standing TF with a steel casing - if aluminium TF (i_tf_sup = 2) : Free standing TF with a bucking structure Rem : the case is a bucking structure - =0 : Free standing TF without case/bucking cyliner (only a conductor layer) - =1 : Free standing TF with a case/bucking cylinder made of - if copper resistive TF (i_tf_sup = 0) : used defined bucking cylinder - if Superconducting TF (i_tf_sup = 1) : Steel casing - if aluminium resisitive TF (i_tf_sup = 2) : used defined bucking cylinder - =2 : The TF is in contact with the CS : "bucked and wedged design" Fast version : thin TF-CS interface neglected in the stress calculations (3 layers) The CS is frictionally decoupled from the TF, does not carry axial tension - =3 : The TF is in contact with the CS : "bucked and wedged design" Full version : thin TF-CS Kapton interface introduced in the stress calculations (4 layers) The CS and kaptop are frictionally decoupled from the TF, do not carry axial tension

    n_tf_graded_layersintegerNone

    Number of layers of different stress properties in the WP. If n_tf_graded_layers > 1, a graded coil is condidered

    n_tf_stress_layersintegerNone

    Number of layers considered for the inboard TF stress calculations set in initial.f90 from i_tf_bucking and n_tf_graded_layers

    n_tf_wp_layersintegerNone

    Maximum number of layers that can be considered in the TF coil composited/smeared stress analysis. This is the layers of one turn, not the entire WP. Default: 5. void, conductor, copper, conduit, insulation.

    jbusrealNone

    bussing current density (A/m2)

    j_crit_str_tfrealNone

    j_crit_str : superconductor strand critical current density under operating conditions (A/m2). Necessary for the cost calculation in $/kAm

    j_crit_str_0realNone

    j_crit_str_pf_0 : superconductor strand critical current density at 6 T and 4.2 K (A/m2) Necessary for the cost calculation in $/kAm

    jwdgcrtrealNone

    critical current density for winding pack (A/m2)

    jwdgprorealNone

    allowable TF coil winding pack current density, for dump temperature rise protection (A/m2)

    jwptfrealNone

    winding pack engineering current density (A/m2)

    oacdcprealNone

    Overall current density in TF coil inboard legs midplane (A/m2) Rem SK : Not used in tfcoil to set the current any more. Should not be used as iteration variable 12 any more. It is now calculated.

    eyoung_insrealNone

    Insulator Young's modulus [Pa]. Default value (1.0D8) setup the following values - SC TF, eyoung_ins = 20 Gpa (default value from DDD11-2 v2 2 (2009)) - Al TF, eyoung_ins = 2.5 GPa (Kapton polymer)

    eyoung_steelrealNone

    Steel case Young's modulus (Pa) (default value from DDD11-2 v2 2 (2009))

    eyoung_cond_axialrealNone

    SC TF coil conductor Young's modulus in the parallel (along the wire/tape) direction [Pa] Set by user input only if i_tf_cond_eyoung_axial == 1; otherwise set by the behavior of that switch.

    eyoung_cond_transrealNone

    SC TF coil conductor Young's modulus in the transverse direction [Pa] Set by user input only if i_tf_cond_eyoung_axial == 1; otherwise set by the behavior of that switch.

    eyoung_res_tf_buckrealNone

    Resistive TF magnets bucking cylinder young modulus (Pa)

    eyoung_copperrealNone

    Copper young modulus. Default value taken from wikipedia

    eyoung_alrealNone

    Aluminium young modulus. Default value taken from wikipedia

    poisson_steelrealNone

    Steel Poisson's ratio, Source : https://www.engineeringtoolbox.com/metals-poissons-ratio-d_1268.html

    poisson_copperrealNone

    Copper Poisson's ratio. Source : https://www.engineeringtoolbox.com/poissons-ratio-d_1224.html

    poisson_alrealNone

    Aluminium Poisson's ratio. Source : https://www.engineeringtoolbox.com/poissons-ratio-d_1224.html

    poisson_insrealNone

    Insulation Poisson's ratio. Default: Kapton. Source : DuPont™ Kapton® HN datasheet.

    poisson_cond_axialrealNone

    SC TF coil conductor Poisson's ratio in the parallel-transverse direction

    poisson_cond_transrealNone

    SC TF coil conductor Poisson's ratio in the transverse-transverse direction

    rbmaxrealNone

    Radius of maximum TF B-field (m)

    tflegresrealNone

    TF coil leg resistance (ohm)

    toroidalgaprealNone

    Minimal distance between two toroidal coils. (m)

    ftoroidalgaprealNone

    F-value for minimum tftort (constraint equation 82)

    ripmaxrealNone

    aximum allowable toroidal field ripple amplitude at plasma edge (%)

    ripplerealNone

    peak/average toroidal field ripple at plasma edge (%)

    ritfcrealNone

    total (summed) current in TF coils (A)

    n_radial_arrayinteger50

    Size of the radial distribution arrays per layers used for stress, strain and displacement distibution

    radial_arrayrealNone

    Array refining the radii of the stress calculations arrays

    sig_tf_rrealNone

    TF Inboard leg radial stress in steel r distribution at mid-plane [Pa]

    sig_tf_trealNone

    TF Inboard leg tangential stress in steel r distribution at mid-plane [Pa]

    deflectrealNone

    TF coil radial deflection (displacement) radial distribution [m]

    sig_tf_zrealNone

    TF Inboard leg vertical tensile stress in steel at mid-plane [Pa]

    sig_tf_vmisesrealNone

    TF Inboard leg Von-Mises stress in steel r distribution at mid-plane [Pa]

    sig_tf_trescarealNone

    TF Inboard leg maximum shear stress (Tresca criterion) in steel r distribution at mid-plane [Pa]

    sig_tf_cs_buckedrealNone

    Maximum shear stress (Tresca criterion) in CS structures at CS flux swing [Pa]:

    • If superconducting CS (ipfres = 0): turn steel conduits stress
    • If resistive CS (ipfres = 1): copper conductor stress

    Quantity only computed for bucked and wedged design (i_tf_bucking >= 2) Def : CS Flux swing, instant when the current changes sign in CS (null current)

    sig_tf_caserealNone

    Maximum shear stress (Tresca criterion) in TF casing steel structures (Pa)

    sig_tf_wprealNone
    str_cs_con_resrealNone

    Residual manufacturing strain in CS superconductor material

    str_pf_con_resrealNone

    Residual manufacturing strain in PF superconductor material

    str_tf_con_resrealNone

    Residual manufacturing strain in TF superconductor material If i_str_wp == 0, used to compute the critical surface. Otherwise, the self-consistent winding pack str_wp is used.

    str_wprealNone

    Axial (vertical) strain in the TF coil winding pack found by self-consistent stress/strain calculation. if i_str_wp == 1, used to compute the critical surface. Otherwise, the input value str_tf_con_res is used. Constrain the absolute value using constraint equation 88 You can't have constraint 88 and i_str_wp = 0 at the same time

    str_wp_maxrealNone

    Maximum allowed absolute value of the strain in the TF coil (Constraint equation 88)

    i_str_wpintegerNone

    Switch for the behavior of the TF strain used to compute the strain-dependent critical surface:

    • =0 str_tf_con_res is used
    • =1 str_wp is used
    quench_modelcharacterNone

    switch for TF coil quench model (Only applies to REBCO magnet at present, issue #522):

    • ='exponential' exponential quench with constant discharge resistor
    • ='linear' quench with constant voltage
    time1realNone

    Time at which TF quench is detected (s)

    tcritscrealNone

    critical temperature (K) for superconductor at zero field and strain (i_tf_sc_mat=4, =tc0m)

    tdmptfrealNone

    fast discharge time for TF coil in event of quench (s) (iteration variable 56)

    For REBCO model, meaning depends on quench_model:

    • exponential quench : e-folding time (s)`
    • linear quench : discharge time (s)
    tfareainrealNone

    Area of inboard midplane TF legs (m2)

    tfbuslrealNone

    TF coil bus length (m)

    tfbusmasrealNone

    TF coil bus mass (kg)

    tfckwrealNone

    available DC power for charging the TF coils (kW)

    tfcmwrealNone

    Peak power per TF power supply (MW)

    tfcpmwrealNone

    Peak resistive TF coil inboard leg power (MW)

    tfjtsmwrealNone

    TF joints resistive power losses (MW)

    tfcryoarearealNone

    surface area of toroidal shells covering TF coils (m2)

    tficrnrealNone

    TF coil half-width - inner bore (m)

    tfindrealNone

    TF coil inductance (H)

    tfinsgaprealNone

    TF coil WP insertion gap (m)

    tflegmwrealNone

    TF coil outboard leg resistive power (MW)

    rhocprealNone

    TF coil inboard leg resistivity [Ohm-m]. If itart=0, this variable is the average resistivity over the whole magnet

    rhotflegrealNone

    Resistivity of a TF coil leg (Ohm-m)

    rhotfbusrealNone

    Resistivity of a TF coil bus (Ohm-m). Default value takes the same res as the leg one

    frhocprealNone

    Centrepost resistivity enhancement factor. For itart=0, this factor is used for the whole magnet

    frholegrealNone

    Ouboard legs resistivity enhancement factor. Only used for itart=1.

    i_cp_jointsintegerNone

    Switch for CP demoutable joints type -= 0 : Clampled joints -= 1 : Sliding joints Default value (-1) choses : Sliding joints for resistive magnets (i_tf_sup = 0, 2) Clampled joints for superconducting magents (i_tf_sup = 1)

    rho_tf_jointsrealNone

    TF joints surfacic resistivity [ohm.m]. Feldmetal joints assumed.

    n_tf_joints_contactintegerNone

    Number of contact per turn

    n_tf_jointsintegerNone

    Number of joints Ex: n_tf_joints = 2 for top and bottom CP joints

    th_joint_contactrealNone

    TF sliding joints contact pad width [m]

    pres_jointsrealNone

    Calculated TF joints resistive power losses [W]

    tflengrealNone

    TF coil circumference (m)

    eff_tf_cryorealNone

    TF cryoplant efficiency (compared to pefect Carnot cycle). Using -1 set the default value depending on magnet technology:

    • i_tf_sup = 1 : SC magnet, eff_tf_cryo = 0.13 (ITER design)
    • i_tf_sup = 2 : Cryo-aluminium, eff_tf_cryo = 0.4
    n_tfrealNone

    Number of TF coils (default = 50 for stellarators). Number of TF coils outer legs for ST

    tfocrnrealNone

    TF coil half-width - outer bore (m)

    tfsairealNone

    area of the inboard TF coil legs (m2)

    tfsaorealNone

    area of the outboard TF coil legs (m2)

    tftmprealNone

    peak helium coolant temperature in TF coils and PF coils (K)

    tftortrealNone

    TF coil toroidal thickness (m)

    thicndutrealNone

    conduit insulation thickness (m)

    layer_insrealNone

    Additional insulation thickness between layers (m)

    thkcasrealNone

    inboard TF coil case outer (non-plasma side) thickness (m) (iteration variable 57) (calculated for stellarators)

    dr_tf_wprealNone

    radial thickness of winding pack (m) (iteration variable 140) (issue #514)

    thwcndutrealNone

    TF coil conduit case thickness (m) (iteration variable 58)

    tinstfrealNone

    Thickness of the ground insulation layer surrounding (m) - Superconductor TF (i_tf_sup == 1) : The TF coil Winding packs - Resistive magnets (i_tf_sup /= 1) : The TF coil wedges Rem : Thickness calculated for stellarators.

    tmargmin_tfrealNone

    minimum allowable temperature margin : TF coils (K)

    tmargmin_csrealNone

    minimum allowable temperature margin : CS (K)

    tmargminrealNone

    minimum allowable temperature margin : TFC AND CS (K)

    temp_marginrealNone

    temperature margin (K)

    tmargtfrealNone

    TF coil temperature margin (K)

    tmaxprorealNone

    maximum temp rise during a quench for protection (K)

    tmax_crocorealNone

    CroCo strand: maximum permitted temp during a quench (K)

    croco_quench_temperaturerealNone

    CroCo strand: Actual temp reached during a quench (K)

    tmpcryrealNone

    coil temperature for cryogenic plant power calculation (K)

    n_tf_turnrealNone

    number of turns per TF coil

    vdalwrealNone

    max voltage across TF coil during quench (kV) (iteration variable 52)

    vforcerealNone

    vertical tension on inboard leg/coil (N)

    f_vforce_inboardrealNone

    Fraction of the total vertical force taken by the TF inboard leg tension Not used for resistive itart=1 (sliding joints)

    vforce_outboardrealNone

    Vertical tension on outboard leg/coil (N)

    vftfrealNone

    coolant fraction of TFC 'cable' (i_tf_sup=1), or of TFC leg (i_tf_ssup=0)

    voltflegrealNone

    volume of each TF coil outboard leg (m3)

    vtfkvrealNone

    TF coil voltage for resistive coil including bus (kV)

    vtfskvrealNone

    voltage across a TF coil during quench (kV)

    whtcasrealNone

    mass per coil of external case (kg)

    whtconrealNone

    TF coil conductor mass per coil (kg/coil). For itart=1, coil is return limb plus centrepost/n_tf

    whtconcurealNone

    copper mass in TF coil conductor (kg/coil). For itart=1, coil is return limb plus centrepost/n_tf

    whtconalrealNone

    Aluminium mass in TF coil conductor (kg/coil). For itart=1, coil is return limb plus centrepost/n_tf

    whtconinrealNone

    conduit insulation mass in TF coil conductor (kg/coil)

    whtconscrealNone

    superconductor mass in TF coil cable (kg/coil)

    whtconshrealNone

    steel conduit mass in TF coil conductor (kg/coil)

    whtgwrealNone

    mass of ground-wall insulation layer per coil (kg/coil)

    whttfrealNone

    total mass of the TF coils (kg)

    wwp1realNone

    width of first step of winding pack (m)

    wwp2realNone

    width of second step of winding pack (m)

    dthetrealNone

    angle of arc i (rad)

    radctfrealNone

    radius of arc i (m)

    xarcrealNone

    x location of arc point i on surface (m)

    xctfcrealNone

    x location of arc centre i (m)

    yarcrealNone

    y location of arc point i on surface (m)

    yctfcrealNone

    y location of arc centre i (m)

    tfarealNone

    Horizontal radius of inside edge of TF coil (m)

    tfbrealNone

    Vertical radius of inside edge of TF coil (m)

    drtoprealNone

    centrepost taper maximum radius adjustment (m)

    dztoprealNone

    centrepost taper height adjustment (m)

    etapumprealNone

    centrepost coolant pump efficiency

    fcoolcprealNone

    coolant fraction of TF coil inboard legs (iteration variable 23)

    fcoollegrealNone

    coolant fraction of TF coil outboard legs

    a_cp_coolrealNone

    Centrepost cooling area toroidal cross-section (constant over the whole CP)

    ncoolrealNone

    number of centrepost coolant tubes

    ppumprealNone

    centrepost coolant pump power (W)

    prescprealNone

    resistive power in the centrepost (itart=1) [W]. If itart=0, this variable is the ressitive power on the whole magnet

    preslegrealNone

    Summed resistive power in the TF coil legs [W]. Remain 0 if itart=0.

    ptempalwrealNone

    maximum peak centrepost temperature (K) (constraint equation 44)

    rcoolrealNone

    average radius of coolant channel (m) (iteration variable 69)

    tcoolinrealNone

    centrepost coolant inlet temperature (K)

    dtiocoolrealNone

    inlet / outlet TF coil coolant temperature rise (K)

    tcpavrealNone

    Average temperature of centrepost called CP (K). Only used for resistive coils to compute the resisitive heating. Must be an iteration variable for ST (itart=1) (iteration variable 20)

    tcpav2realNone

    Computed centrepost average temperature (K) (for consistency)

    tlegavrealNone

    Average temperature of the TF outboard legs [K]. If tlegav=-1.0, the ouboard legs and CP temperatures are the same. Fixed for now, should use a contraints eq like tcpav

    tcpmaxrealNone

    peak centrepost temperature (K)

    vcoolrealNone

    inlet centrepost coolant flow speed at midplane (m/s) (iteration variable 70)

    vol_cond_cprealNone

    Exact conductor volume in the centrepost (m3)

    whtcprealNone

    mass of TF coil inboard legs (kg)

    whttflgsrealNone

    mass of the TF coil legs (kg)

    cryo_cool_reqrealNone

    Cryo cooling requirement at helium temp 4.5K (kW)

    theta1_coilrealNone

    The angle of the outboard arc forming the TF coil current center line [deg]

    theta1_vvrealNone

    The angle of the outboard arc forming the Vacuum Vessel current center line [deg]

    max_vv_stressrealNone

    The allowable peak maximum shear stress in the vacuum vessel due to quench and fast discharge of the TF coils [Pa]

    ife_variables

    Variable nameTypeInitialDescription
    maxmatinteger8

    Total number of materials in IFE device. Material numbers are as follows:

    • =0 void
    • =1 steel
    • =2 carbon cloth
    • =3 FLiBe
    • =4 lithium oxide Li2O
    • =5 concrete
    • =6 helium
    • =7 xenon
    • =8 lithium
    bldrrealNone

    radial thickness of IFE blanket (m; calculated if ifetyp=4)

    bldrcrealNone

    radial thickness of IFE curtain (m; ifetyp=4)

    bldzlrealNone

    vertical thickness of IFE blanket below chamber (m)

    bldzurealNone

    vertical thickness of IFE blanket above chamber (m)

    blmatfrealNone

    IFE blanket material fractions

    blmatmrealNone

    IFE blanket material masses (kg)

    blmatvrealNone

    IFE blanket material volumes (m3)

    blvolrealNone

    IFE blanket volume (m3)

    cdriv0realNone

    IFE generic/laser driver cost at edrive=0 (M$)

    cdriv1realNone

    IFE low energy heavy ion beam driver cost extrapolated to edrive=0 (M$)

    cdriv2realNone

    IFE high energy heavy ion beam driver cost extrapolated to edrive=0 (M$)

    cdriv3realNone

    IFE driver cost ($/J wall plug) (ifedrv==3)

    chdzlrealNone

    vertical thickness of IFE chamber below centre (m)

    chdzurealNone

    vertical thickness of IFE chamber above centre (m)

    chmatfrealNone

    IFE chamber material fractions

    chmatmrealNone

    IFE chamber material masses (kg)

    chmatvrealNone

    IFE chamber material volumes (m3)

    chradrealNone

    radius of IFE chamber (m) (iteration variable 84)

    chvolrealNone

    IFE chamber volume (m3)

    dcdrv0realNone

    IFE generic/laser driver cost gradient (M$/MJ)

    dcdrv1realNone

    HIB driver cost gradient at low energy (M$/MJ)

    dcdrv2realNone

    HIB driver cost gradient at high energy (M$/MJ)

    drveffrealNone

    IFE driver wall plug to target efficiency (ifedrv=0,3) (iteration variable 82)

    edriverealNone

    IFE driver energy (J) (iteration variable 81)

    etadrvrealNone

    IFE driver wall plug to target efficiency

    etalirealNone

    IFE lithium pump wall plug efficiency (ifetyp=4)

    etaverealNone

    IFE driver efficiency vs driver energy (ifedrv=-1)

    fauxboprealNone

    fraction of gross electric power to balance-of-plant (IFE)

    fbreedrealNone

    fraction of breeder external to device core

    fburnrealNone

    IFE burn fraction (fraction of tritium fused/target)

    fliradrealNone

    radius of FLiBe/lithium inlet (m) (ifetyp=3,4)

    frrmaxrealNone

    f-value for maximum IFE repetition rate (constraint equation 50, iteration variable 86)

    fwdrrealNone

    radial thickness of IFE first wall (m)

    fwdzlrealNone

    vertical thickness of IFE first wall below chamber (m)

    fwdzurealNone

    vertical thickness of IFE first wall above chamber (m)

    fwmatfrealNone

    IFE first wall material fractions

    fwmatmrealNone

    IFE first wall material masses (kg)

    fwmatvrealNone

    IFE first wall material volumes (kg)

    fwvolrealNone

    IFE first wall volume (m3)

    gainrealNone

    IFE target gain

    gainverealNone

    IFE target gain vs driver energy (ifedrv=-1)

    htpmw_iferealNone

    IFE heat transport system electrical pump power (MW)

    ifeintegerNone

    Switch for IFE option:

    • =0 use tokamak, RFP or stellarator model
    • =1 use IFE model
    ifedrvintegerNone

    Switch for type of IFE driver:

    • =-1 use gainve, etave for gain and driver efficiency
    • =0 use tgain, drveff for gain and driver efficiency
    • =1 use laser driver based on SOMBRERO design
    • =2 use heavy ion beam driver based on OSIRIS
    • =3 Input pfusife, rrin and drveff
    ifetypintegerNone

    Switch for type of IFE device build:

    • =0 generic (cylindrical) build
    • =1 OSIRIS-like build
    • =2 SOMBRERO-like build
    • =3 HYLIFE-II-like build
    • =4 2019 build
    lipmwrealNone

    IFE lithium pump power (MW; ifetyp=4)

    mcdrivrealNone

    IFE driver cost multiplier

    mfliberealNone

    total mass of FLiBe (kg)

    pdriverealNone

    IFE driver power reaching target (W) (iteration variable 85)

    pfusiferealNone

    IFE input fusion power (MW) (ifedrv=3 only; itv 155)

    pifecrrealNone

    IFE cryogenic power requirements (MW)

    ptargfrealNone

    IFE target factory power at 6 Hz repetition rate (MW)

    r1realNone

    IFE device radial build (m)

    r2realNone

    IFE device radial build (m)

    r3realNone

    IFE device radial build (m)

    r4realNone

    IFE device radial build (m)

    r5realNone

    IFE device radial build (m)

    r6realNone

    IFE device radial build (m)

    r7realNone

    IFE device radial build (m)

    repratrealNone

    IFE driver repetition rate (Hz)

    rrinrealNone

    Input IFE repetition rate (Hz) (ifedrv=3 only; itv 156)

    rrmaxrealNone

    maximum IFE repetition rate (Hz)

    shdrrealNone

    radial thickness of IFE shield (m)

    shdzlrealNone

    vertical thickness of IFE shield below chamber (m)

    shdzurealNone

    vertical thickness of IFE shield above chamber (m)

    shmatfrealNone

    IFE shield material fractions

    shmatmrealNone

    IFE shield material masses (kg)

    shmatvrealNone

    IFE shield material volumes (kg)

    shvolrealNone

    IFE shield volume (m3)

    sombdrrealNone

    radius of cylindrical blanket section below chamber (ifetyp=2)

    somtdrrealNone

    radius of cylindrical blanket section above chamber (ifetyp=2)

    taufallrealNone

    Lithium Fall Time (s)

    tdspmwrealNone

    IFE target delivery system power (MW)

    tfacmwrealNone

    IFE target factory power (MW)

    tgainrealNone

    IFE target gain (if ifedrv = 0) (iteration variable 83)

    uccarbrealNone

    cost of carbon cloth ($/kg)

    ucconcrealNone

    cost of concrete ($/kg)

    ucflibrealNone

    cost of FLiBe ($/kg)

    uctargrealNone

    cost of IFE target ($/target)

    v1drrealNone

    radial thickness of IFE void between first wall and blanket (m)

    v1dzlrealNone

    vertical thickness of IFE void 1 below chamber (m)

    v1dzurealNone

    vertical thickness of IFE void 1 above chamber (m)

    v1matfrealNone

    IFE void 1 material fractions

    v1matmrealNone

    IFE void 1 material masses (kg)

    v1matvrealNone

    IFE void 1 material volumes (kg)

    v1volrealNone

    IFE void 1 volume (m3)

    v2drrealNone

    radial thickness of IFE void between blanket and shield (m)

    v2dzlrealNone

    vertical thickness of IFE void 2 below chamber (m)

    v2dzurealNone

    vertical thickness of IFE void 2 above chamber (m)

    v2matfrealNone

    IFE void 2 material fractions

    v2matmrealNone

    IFE void 2 material masses (kg)

    v2matvrealNone

    IFE void 2 material volumes (kg)

    v2volrealNone

    IFE void 2 volume (m3)

    v3drrealNone

    radial thickness of IFE void outside shield (m)

    v3dzlrealNone

    vertical thickness of IFE void 3 below chamber (m)

    v3dzurealNone

    vertical thickness of IFE void 3 above chamber (m)

    v3matfrealNone

    IFE void 3 material fractions

    v3matmrealNone

    IFE void 3 material masses (kg)

    v3matvrealNone

    IFE void 3 material volumes (kg)

    v3volrealNone

    IFE void 3 volume (m3)

    zl1realNone

    IFE vertical build below centre (m)

    zl2realNone

    IFE vertical build below centre (m)

    zl3realNone

    IFE vertical build below centre (m)

    zl4realNone

    IFE vertical build below centre (m)

    zl5realNone

    IFE vertical build below centre (m)

    zl6realNone

    IFE vertical build below centre (m)

    zl7realNone

    IFE vertical build below centre (m)

    zu1realNone

    IFE vertical build above centre (m)

    zu2realNone

    IFE vertical build above centre (m)

    zu3realNone

    IFE vertical build above centre (m)

    zu4realNone

    IFE vertical build above centre (m)

    zu5realNone

    IFE vertical build above centre (m)

    zu6realNone

    IFE vertical build above centre (m)

    zu7realNone

    IFE vertical build above centre (m)

    stellarator_variables

    Variable nameTypeInitialDescription
    istellintegerNone

    Switch for stellarator option (set via device.dat):

    • =0 use tokamak model
    • =1 use stellarator model: Helias5
    • =2 use stellarator model: Helias4
    • =3 use stellarator model: Helias3
    • =4 use stellarator model: Wendelstein 7-X with 50 Coils
    • =5 use stellarator model: Wendelstein 7-X with 30 Coils
    • =6 use stellarator model: Use stella_conf.json file (any modulear stellarator, see documentation)
    bmnrealNone

    relative radial field perturbation

    f_asymrealNone

    divertor heat load peaking factor

    f_radrealNone

    radiated power fraction in SOL

    f_wrealNone

    island size fraction factor

    fdivwetrealNone

    wetted fraction of the divertor area

    flpitchrealNone

    field line pitch (rad)

    hportamaxrealNone

    maximum available area for horizontal ports (m2)

    hportpmaxrealNone

    maximum available poloidal extent for horizontal ports (m)

    hporttmaxrealNone

    maximum available toroidal extent for horizontal ports (m)

    iotabarrealNone

    rotational transform (reciprocal of tokamak q) for stellarator confinement time scaling laws

    isthtrintegerNone

    Switch for stellarator auxiliary heating method:

    • = 1electron cyclotron resonance heating
    • = 2lower hybrid heating
    • = 3neutral beam injection
    m_resintegerNone

    poloidal resonance number (1)

    max_gyrotron_frequencyrealNone

    Maximal available gyrotron frequency (input parameter) (Hz)

    n_resintegerNone

    toroidal resonance number (1)

    shearrealNone

    magnetic shear, derivative of iotabar (1)

    te0_ecrh_achievablerealNone

    maximal central electron temperature as achievable by the ECRH, input. (keV)

    vportamaxrealNone

    maximum available area for vertical ports (m2)

    vportpmaxrealNone

    maximum available poloidal extent for vertical ports (m)

    vporttmaxrealNone

    maximum available toroidal extent for vertical ports (m)

    powerht_constraintrealNone
    powerscaling_constraintrealNone

    constants

    Variable nameTypeInitialDescription
    iottyinteger6
    noutinteger11
    nplotinteger12
    mfileinteger13
    vfileinteger14
    opt_fileinteger15
    sig_fileinteger16
    degradreal0.01745329251D0
    electron_chargereal1.602176634D-19
    electron_voltreal1.602176634D-19
    kiloelectron_voltreal1.602176634D-16
    atomic_mass_unitreal1.66053906892D-27
    electron_massreal9.1093837139D-31
    proton_massreal1.67262192595D-27
    deuteron_massreal3.3435837768D-27
    triton_massreal5.0073567512D-27
    neutron_massreal1.67492750056D-27
    alpha_massreal6.6446573450D-27
    helion_massreal5.0064127862D-27
    speed_lightreal299792458D0
    d_t_energyreal(((deuteron_mass+triton_mass)-(alpha_mass+neutron_mass))*speed_light**2)
    d_helium_energyreal(((deuteron_mass+helion_mass)-(alpha_mass+proton_mass))*speed_light**2)
    dd_helium_energyreal(((deuteron_mass+deuteron_mass)-(helion_mass+neutron_mass))*speed_light**2)
    dd_triton_energyreal(((deuteron_mass+deuteron_mass)-(triton_mass+proton_mass))*speed_light**2)
    dt_neutron_energy_fractionreal(alpha_mass/(neutron_mass+alpha_mass))
    dt_alpha_energyreal(1.0D0-dt_neutron_energy_fraction)*d_t_energy
    dd_neutron_energy_fractionreal(helion_mass/(neutron_mass+helion_mass))
    dd_proton_energy_fractionreal(triton_mass/(proton_mass+triton_mass))
    dhelium_proton_energy_fractionreal(alpha_mass/(proton_mass+alpha_mass))
    pireal3.1415926535897932D0
    rmu0real1.256637062D-6
    twopireal6.2831853071795862D0
    umassreal1.660538921D-27
    epsilon0real8.85418781D-12
    cph2oreal4180.0D0
    dcopperrealNone
    dalurealNone
    denh2oreal985.0D0
    k_copperreal330.0D0
    kh2oreal0.651D0
    muh2oreal4.71D-4
    n_day_yearreal365.2425D0

    stellarator_configuration

    Variable nameTypeInitialDescription
    stella_config_namecharacterNone
    stella_config_symmetryintegerNone
    stella_config_coilspermoduleintegerNone
    stella_config_rmajor_refrealNone
    stella_config_rminor_refrealNone
    stella_config_coil_rmajorrealNone
    stella_config_coil_rminorrealNone
    stella_config_aspect_refrealNone
    stella_config_bt_refrealNone
    stella_config_WP_arearealNone
    stella_config_WP_bmaxrealNone
    stella_config_i0realNone
    stella_config_a1realNone
    stella_config_a2realNone
    stella_config_dminrealNone
    stella_config_inductancerealNone
    stella_config_coilsurfacerealNone
    stella_config_coillengthrealNone
    stella_config_max_portsize_widthrealNone
    stella_config_maximal_coil_heightrealNone
    stella_config_min_plasma_coil_distancerealNone
    stella_config_derivative_min_LCFS_coils_distrealNone
    stella_config_plasma_volumerealNone
    stella_config_plasma_surfacerealNone
    stella_config_WP_ratiorealNone
    stella_config_max_force_densityrealNone
    stella_config_max_force_density_MNmrealNone
    stella_config_min_bend_radiusrealNone
    stella_config_epseffrealNone
    stella_config_max_lateral_force_densityrealNone
    stella_config_max_radial_force_densityrealNone
    stella_config_centering_force_max_MNrealNone
    stella_config_centering_force_min_MNrealNone
    stella_config_centering_force_avg_MNrealNone
    stella_config_neutron_peakfactorrealNone
    sc_D11_star_mono_inputrealNone
    sc_nu_star_mono_inputrealNone

    pfcoil_module

    Variable nameTypeInitialDescription
    nefintegerNone
    nfxfintegerNone
    ricpfrealNone
    ssq0realNone
    sig_axialrealNone
    sig_hooprealNone
    axial_forcerealNone
    rfxfrealNone
    zfxfrealNone
    cfxfrealNone
    xindrealNone
    rclsrealNone
    zclsrealNone
    cclsrealNone
    ccl0realNone
    bpf2realNone
    vsdumrealNone
    first_calllogicalNone
    CSlimitlogicalNone
    conductorpftypeNone
    croco_strandtypeNone

    scan_module

    Variable nameTypeInitialDescription
    ipnscnsinteger1000

    Maximum number of scan points

    ipnscnvinteger81

    Number of available scan variables

    noutvarsinteger84
    widthinteger110
    scan_dimintegerNone

    1-D or 2-D scan switch (1=1D, 2=2D)

    isweepintegerNone

    Number of scan points to calculate

    isweep_2integerNone

    Number of 2D scan points to calculate

    nsweepintegerNone

    Switch denoting quantity to scan:

    • 1 aspect
    • 2 hldivlim
    • 3 pnetelin
    • 4 hfact
    • 5 oacdcp
    • 6 walalw
    • 7 beamfus0
    • 8 fqval
    • 9 te
    • 10 boundu(15: fvs)
    • 11 dnbeta
    • 12 bootstrap_current_fraction_max
    • 13 boundu(10: hfact)
    • 14 fiooic
    • 15 fjprot
    • 16 rmajor
    • 17 bmxlim
    • 18 gammax
    • 19 boundl(16: ohcth)
    • 20 tbrnmn
    • 21 not used
    • 22 cfactr (N.B. requires iavail=0)
    • 23 boundu(72: fipir)
    • 24 powfmax
    • 25 kappa
    • 26 triang
    • 27 tbrmin (for blktmodel > 0 only)
    • 28 bt
    • 29 coreradius
    • 30 fimpvar # OBSOLETE
    • 31 taulimit
    • 32 epsvmc
    • 33 ttarget
    • 34 qtargettotal
    • 35 lambda_q_omp
    • 36 lambda_target
    • 37 lcon_factor
    • 38 Neon upper limit
    • 39 Argon upper limit
    • 40 Xenon upper limit
    • 41 blnkoth
    • 42 Argon fraction fimp(9)
    • 43 normalised minor radius at which electron cyclotron current drive is maximum
    • 44 Allowable maximum shear stress (Tresca) in tf coil structural material
    • 45 Minimum allowable temperature margin ; tf coils
    • 46 boundu(150) fgwsep
    • 47 impurity_enrichment(9) Argon impurity enrichment
    • 48 TF coil - n_pancake (integer turn winding pack)
    • 49 TF coil - n_layer (integer turn winding pack)
    • 50 Xenon fraction fimp(13)
    • 51 Power fraction to lower DN Divertor ftar
    • 52 SoL radiation fraction
    • 54 GL_nbti upper critical field at 0 Kelvin
    • 55 shldith : Inboard neutron shield thickness
    • 56 crypmw_max: Maximum cryogenic power (ixx=164, ixc=87)
    • 57 bt lower boundary
    • 58 scrapli : Inboard plasma-first wall gap
    • 59 scraplo : Outboard plasma-first wall gap
    • 60 sig_tf_wp_max: Allowable stress in TF Coil conduit (Tresca)
    • 61 copperaoh_m2_max : CS coil current / copper area
    • 62 coheof : CS coil current density at EOF
    • 63 ohcth : CS thickness (m)
    • 64 ohhghf : CS height (m)
    • 65 n_cycle_min : Minimum cycles for CS stress model constraint 90
    • 66 oh_steel_frac: Steel fraction in CS coil
    • 67 t_crack_vertical: Initial crack vertical dimension (m)
  • 68 inlet_temp_liq' : Inlet temperature of blanket liquid metal coolant/breeder (K) <LI> 69outlet_temp_liq' : Outlet temperature of blanket liquid metal coolant/breeder (K)
  • 70 blpressure_liq' : Blanket liquid metal breeder/coolant pressure (Pa) <LI> 71n_liq_recirc' : Selected number of liquid metal breeder recirculations per day
  • 72 bz_channel_conduct_liq' : Conductance of liquid metal breeder duct walls (A V-1 m-1) <LI> 73pnuc_fw_ratio_dcll' : Ratio of FW nuclear power as fraction of total (FW+BB)
  • 74 `f_nuc_pow_bz_struct' : Fraction of BZ power cooled by primary coolant for dual-coolant balnket
  • 75 pitch : pitch of first wall cooling channels (m)
  • 76 etath : Thermal conversion eff.
  • 77 startupratio : Gyrotron redundancy
  • 78 fkind : Multiplier for Nth of a kind costs
  • 79 etaech : ECH wall plug to injector efficiency

  • nsweep_2integerNone

    nsweep_2 /3/ : switch denoting quantity to scan for 2D scan:

    sweeprealNone

    sweep(ipnscns) /../: actual values to use in scan

    sweep_2realNone

    sweep_2(ipnscns) /../: actual values to use in 2D scan

    first_call_1dlogicalNone
    first_call_2dlogicalNone

    neoclassics_constants

    Variable nameTypeInitialDescription
    no_rootsinteger30

    neoclassics_module

    Variable nameTypeInitialDescription
    speciescharacter(/"e", "D", "T", "a"/)
    densitiesrealNone
    temperaturesrealNone
    dr_densitiesrealNone
    dr_temperaturesrealNone
    rootsreal0
    weightsreal0
    nureal0
    nu_starreal0
    nu_star_averagedreal0
    vdreal0
    KTreal0
    Erreal0.0
    iotareal1.0d0
    D11_monoreal0
    D11_plateaureal0
    D111real0
    D112real0
    D113real0
    q_fluxreal0
    Gamma_fluxreal0
    D31_monoreal0
    eps_effreal1d-5
    r_effreal0

    primary_pumping_variables

    Variable nameTypeInitialDescription
    gamma_herealNone

    ratio of specific heats for helium (primary_pumping=3)

    t_in_bbrealNone

    temperature in FW and blanket coolant at blanket entrance (primary_pumping=3) [K]

    t_out_bbrealNone

    temperature in FW and blanket coolant at blanket exit (primary_pumping=3) [K]

    p_herealNone

    pressure in FW and blanket coolant at pump exit (primary_pumping=3) [Pa]

    dp_herealNone

    pressure drop in FW and blanket coolant including heat exchanger and pipes (primary_pumping=3) [Pa]

    dp_fw_blktrealNone

    pressure drop in FW and blanket coolant including heat exchanger and pipes (primary_pumping=3) [Pa]

    dp_fwrealNone

    pressure drop in FW coolant including heat exchanger and pipes (primary_pumping=3) [Pa]

    dp_blktrealNone

    pressure drop in blanket coolant including heat exchanger and pipes (primary_pumping=3) [Pa]

    dp_liqrealNone

    pressure drop in liquid metal blanket coolant including heat exchanger and pipes (primary_pumping=3) [Pa]

    htpmw_fw_blktrealNone

    mechanical pumping power for FW and blanket including heat exchanger and pipes (primary_pumping=3) [MW]

    divertor_variables

    Variable nameTypeInitialDescription
    adasrealNone

    area divertor / area main plasma (along separatrix)

    angincrealNone

    angle of incidence of field line on plate (rad)

    beta_divrealNone

    field line angle wrt divertor target plate (degrees)

    betairealNone

    poloidal plane angle between divertor plate and leg, inboard (rad)

    betaorealNone

    poloidal plane angle between divertor plate and leg, outboard (rad)

    bpsoutrealNone

    reference B_p at outboard divertor strike point (T)

    c1divrealNone

    fitting coefficient to adjust ptpdiv, ppdiv

    c2divrealNone

    fitting coefficient to adjust ptpdiv, ppdiv

    c3divrealNone

    fitting coefficient to adjust ptpdiv, ppdiv

    c4divrealNone

    fitting coefficient to adjust ptpdiv, ppdiv

    c5divrealNone

    fitting coefficient to adjust ptpdiv, ppdiv

    c6divrealNone

    fitting coefficient to adjust ptpdiv, ppdiv

    delldrealNone

    coeff for power distribution along main plasma

    dendivrealNone

    plasma density at divertor (10**20 /m3)

    densinrealNone

    density at plate (on separatrix) (10**20 /m3)

    divclfrrealNone

    divertor coolant fraction

    divdensrealNone

    divertor structure density (kg/m3)

    divdumintegerNone

    switch for divertor Zeff model:

    • =0 calc
    • =1 input
    divfixrealNone

    divertor structure vertical thickness (m)

    divmasrealNone

    divertor plate mass (kg)

    divpltrealNone

    divertor plate thickness (m) (from Spears, Sept 1990)

    divsurrealNone

    divertor surface area (m2)

    fdfsrealNone

    radial gradient ratio

    fdivarealNone

    divertor area fudge factor (for ITER, Sept 1990)

    fhoutrealNone

    fraction of power to outboard divertor (for single null)

    fififirealNone

    coefficient for gamdiv

    flux_exprealNone

    The plasma flux expansion in the divertor (default 2; Wade 2020)

    frrprealNone

    fraction of radiated power to plate

    hldivrealNone

    divertor heat load (MW/m2)

    i_hldivintegerNone

    switch for user input hldiv:

    • = 0: divtart model turned off and user inputs hldiv
    • = 1: divtart model calculates hldiv
    • = 2: divwade model calculates hldiv
    hldivlimrealNone

    heat load limit (MW/m2)

    ksicrealNone

    power fraction for outboard double-null scrape-off plasma

    lamprealNone

    power flow width (m)

    minstangrealNone

    minimum strike angle for heat flux calculation

    omeganrealNone

    pressure ratio (nT)_plasma / (nT)_scrape-off

    omlargrealNone

    power spillage to private flux factor

    ppdivrrealNone

    peak heat load at plate (with radiation) (MW/m2)

    prn1realNone

    n-scrape-off / n-average plasma; (input for ipedestal=0, = nesep/dene if ipedestal>=1)

    ptpdivrealNone

    peak temperature at the plate (eV)

    rconlrealNone

    connection length ratio, outboard side

    rlclolcnrealNone

    ratio of collision length / connection length

    rlenmaxrealNone

    maximum value for length ratio (rlclolcn) (constraintg eqn 22)

    rsrdrealNone

    effective separatrix/divertor radius ratio

    tconlrealNone

    main plasma connection length (m)

    tdivrealNone

    temperature at divertor (eV) (input for stellarator only, calculated for tokamaks)

    tseprealNone

    temperature at the separatrix (eV)

    xparainrealNone

    parallel heat transport coefficient (m2/s)

    xpertinrealNone

    perpendicular heat transport coefficient (m2/s)

    zeffdivrealNone

    Zeff in the divertor region (if divdum/=0)

    current_drive_variables

    Variable nameTypeInitialDescription
    beamwdrealNone

    width of neutral beam duct where it passes between the TF coils (m) T Inoue et al, Design of neutral beam system for ITER-FEAT, Fusion Engineering and Design, Volumes 56-57, October 2001, Pages 517-521)

    bigqrealNone

    Fusion gain; P_fusion / (P_injection + P_ohmic)

    bootstrap_current_fractionrealNone

    bootstrap current fraction (enforced; see i_bootstrap_current)

    bootstrap_current_fraction_maxrealNone

    maximum fraction of plasma current from bootstrap; if bootstrap_current_fraction_max < 0, bootstrap fraction = abs(bootstrap_current_fraction_max)

    bscf_iter89realNone

    bootstrap current fraction, ITER 1989 model

    bscf_nevinsrealNone

    bootstrap current fraction, Nevins et al model

    bscf_sauterrealNone

    bootstrap current fraction, Sauter et al model

    bscf_wilsonrealNone

    bootstrap current fraction, Wilson et al model

    bscf_sakairealNone

    Bootstrap current fraction, Sakai et al model

    bscf_ariesrealNone

    Bootstrap current fraction, ARIES model

    bscf_andraderealNone

    Bootstrap current fraction, Andrade et al model

    bscf_hoangrealNone

    Bootstrap current fraction, Hoang et al model

    bscf_wongrealNone

    Bootstrap current fraction, Wong et al model

    bscf_gi_IrealNone

    Bootstrap current fraction, first Gi et al model

    bscf_gi_IIrealNone

    Bootstrap current fraction, second Gi et al model

    cbootrealNone

    bootstrap current fraction multiplier

    beam_currentrealNone

    neutral beam current (A)

    diacf_henderrealNone

    diamagnetic current fraction, Hender fit

    diacf_scenerealNone

    diamagnetic current fraction, SCENE fit

    diamagnetic_current_fractionrealNone

    diamagnetic current fraction

    echpwrrealNone

    ECH power (MW)

    echwpowrealNone

    ECH wall plug power (MW)

    effcdrealNone

    current drive efficiency (A/W)

    harnumrealNone

    cyclotron harmonic frequency number, used in cut-off function

    wave_modeintegerNone

    Switch for ECRH wave mode :

    • =0 O-mode
    • =1 X-mode
    beam_energyrealNone

    neutral beam energy (keV) (iteration variable 19)

    etacdrealNone

    auxiliary power wall plug to injector efficiency

    etacdfixrealNone

    secondary auxiliary power wall plug to injector efficiency

    etaechrealNone

    ECH wall plug to injector efficiency

    etalhrealNone

    lower hybrid wall plug to injector efficiency

    etanbirealNone

    neutral beam wall plug to injector efficiency

    fpionrealNone

    fraction of beam energy to ions

    pnbitotrealNone

    neutral beam power entering vacuum vessel

    pscf_scenerealNone

    Pfirsch-Schlüter current fraction, SCENE fit

    nbshinemwrealNone

    neutral beam shine-through power

    feffcdrealNone

    current drive efficiency fudge factor (iteration variable 47)

    forbitlossrealNone

    fraction of neutral beam power lost after ionisation but before thermalisation (orbit loss fraction)

    frbeamrealNone

    R_tangential / R_major for neutral beam injection

    f_tritium_beamrealNone

    fraction of beam that is tritium

    gamcdrealNone

    normalised current drive efficiency (1.0e20 A/(W m^2))

    gamma_ecrhrealNone

    User input ECRH gamma (1.0e20 A/(W m^2))

    xi_ebwrealNone

    User scaling input for EBW plasma heating. Default 0.43

    iefrfintegerNone

    Switch for current drive efficiency model:

    • =1 Fenstermacher Lower Hybrid
    • =2 Ion Cyclotron current drive
    • =3 Fenstermacher ECH
    • =4 Ehst Lower Hybrid
    • =5 ITER Neutral Beam
    • =6 new Culham Lower Hybrid model
    • =7 new Culham ECCD model
    • =8 new Culham Neutral Beam model
    • =9 RFP option removed in PROCESS (issue #508)
    • =10 ECRH user input gamma
    • =11 ECRH "HARE" model (E. Poli, Physics of Plasmas 2019). Removed in #1811.
    • =12 EBW user scaling input. Scaling (S. Freethy)
    iefrffixintegerNone

    Switch for 2nd current drive efficiency model:

    • =0 No fixed current drive
    • =1 Fenstermacher Lower Hybrid
    • =2 Ion Cyclotron current drive
    • =3 Fenstermacher ECH
    • =4 Ehst Lower Hybrid
    • =5 ITER Neutral Beam
    • =6 new Culham Lower Hybrid model
    • =7 new Culham ECCD model
    • =8 new Culham Neutral Beam model
    • =9 RFP option removed in PROCESS (issue #508)
    • =10 ECRH user input gamma
    • =11 ECRH "HARE" model (E. Poli, Physics of Plasmas 2019). Removed in #1811.
    • =12 EBW user scaling input. Scaling (S. Freethy)
    irfcdintegerNone

    Switch for current drive calculation:

    • =0 turned off
    • =1 turned on
    nbshinefrealNone

    neutral beam shine-through fraction

    nbshieldrealNone

    neutral beam duct shielding thickness (m)

    pheatrealNone

    heating power not used for current drive (MW) (iteration variable 11)

    pheatfixrealNone

    secondary fixed heating power not used for current drive (MW)

    pinjalwrealNone

    maximum allowable value for injected power (MW) (constraint equation 30)

    pinjemwrealNone

    auxiliary injected power to electrons (MW)

    pinjimwrealNone

    auxiliary injected power to ions (MW)

    pinjmwrealNone

    total auxiliary injected power (MW)

    pinjfixmwrealNone

    secondary total fixed auxiliary injected power (MW)

    plasma_current_internal_fractionrealNone

    plasma current fraction driven internally (Bootstrap + Diamagnetic + PS)

    plhybdrealNone

    lower hybrid injection power (MW)

    pnbeamrealNone

    neutral beam injection power (MW)

    porbitlossmwrealNone

    neutral beam power lost after ionisation but before thermalisation (orbit loss power) (MW)

    ps_current_fractionrealNone

    Pfirsch-Schlüter current fraction

    pwplhrealNone

    lower hybrid wall plug power (MW)

    pwpnbrealNone

    neutral beam wall plug power (MW)

    rtanbeamrealNone

    neutral beam centreline tangency radius (m)

    rtanmaxrealNone

    maximum tangency radius for centreline of beam (m)

    taubeamrealNone

    neutral beam e-decay lengths to plasma centre

    tbeaminrealNone

    permitted neutral beam e-decay lengths to plasma centre

    numerics

    Variable nameTypeInitialDescription
    ipnvarsinteger175

    ipnvars FIX : total number of variables available for iteration

    ipeqnsinteger91

    ipeqns FIX : number of constraint equations available

    ipnfomsinteger19

    ipnfoms FIX : number of available figures of merit

    ipvlamintegeripeqns+2*ipnvars+1
    iptntinteger(ipeqns*(3*ipeqns+13))/2
    ipvp1integeripnvars+1
    ioptimzintegerNone

    ioptimz /1/ : code operation switch:

    • = -2 for no optimisation, no VMCOM or HYBRD;
    • = -1 for no optimisation, HYBRD only;
    • = 0 for HYBRD and VMCON (not recommended);
    • = 1 for optimisation, VMCON only

    minmax /7/ : switch for figure-of-merit (see lablmm for descriptions) negative => maximise, positive => minimise

    minmaxintegerNone
    lablmmcharacterNone

    lablmm(ipnfoms) : labels describing figures of merit:


    • ( 1) major radius
    • ( 2) not used
    • ( 3) neutron wall load
    • ( 4) P_tf + P_pf
    • ( 5) fusion gain Q
    • ( 6) cost of electricity
    • ( 7) capital cost (direct cost if ireactor=0, constructed cost otherwise)
    • ( 8) aspect ratio
    • ( 9) divertor heat load
    • (10) toroidal field
    • (11) total injected power
    • (12) hydrogen plant capital cost OBSOLETE
    • (13) hydrogen production rate OBSOLETE
    • (14) pulse length
    • (15) plant availability factor (N.B. requires iavail=1 to be set)
    • (16) linear combination of major radius (minimised) and pulse length (maximised) note: FoM should be minimised only!
    • (17) net electrical output
    • (18) Null Figure of Merit
    • (19) linear combination of big Q and pulse length (maximised) note: FoM should be minimised only!

    ncallsintegerNone

    ncalls : number of function calls during solution

    neqnsintegerNone

    neqns /0/ : number of equality constraints to be satisfied

    nfev1integerNone

    nfev1 : number of calls to FCNHYB (HYBRD function caller) made

    nfev2integerNone

    nfev2 : number of calls to FCNVMC1 (VMCON function caller) made

    nineqnsintegerNone

    nineqns /0/ : number of inequality constraints VMCON must satisfy (leave at zero for now)

    nvarintegerNone

    nvar /16/ : number of iteration variables to use

    nviterintegerNone

    nviter : number of VMCON iterations performed

    icc(ipeqns) /0/ : array defining which constraint equations to activate (see lablcc for descriptions)

    iccintegerNone
    active_constraintslogicalNone

    active_constraints(ipeqns) : Logical array showing which constraints are active

    lablcccharacterNone

    lablcc(ipeqns) : labels describing constraint equations (corresponding itvs)


    • ( 1) Beta (consistency equation) (itv 5)
    • ( 2) Global power balance (consistency equation) (itv 10,1,2,3,4,6,11)
    • ( 3) Ion power balance DEPRECATED (itv 10,1,2,3,4,6,11)
    • ( 4) Electron power balance DEPRECATED (itv 10,1,2,3,4,6,11)
    • ( 5) Density upper limit (itv 9,1,2,3,4,5,6)
    • ( 6) (Epsilon x beta poloidal) upper limit (itv 8,1,2,3,4,6)
    • ( 7) Beam ion density (NBI) (consistency equation) (itv 7)
    • ( 8) Neutron wall load upper limit (itv 14,1,2,3,4,6)
    • ( 9) Fusion power upper limit (itv 26,1,2,3,4,6)
    • (10) Toroidal field 1/R (consistency equation) (itv 12,1,2,3,13 )
    • (11) Radial build (consistency equation) (itv 3,1,13,16,29,42,61)
    • (12) Volt second lower limit (STEADY STATE) (itv 15,1,2,3)
    • (13) Burn time lower limit (PULSE) (itv 21,1,16,17,29,42,44,61) (itv 19,1,2,3,6)
    • (14) Neutral beam decay lengths to plasma centre (NBI) (consistency equation)
    • (15) LH power threshold limit (itv 103)
    • (16) Net electric power lower limit (itv 25,1,2,3)
    • (17) Radiation fraction upper limit (itv 28)
    • (18) Divertor heat load upper limit (itv 27)
    • (19) MVA upper limit (itv 30)
    • (20) Neutral beam tangency radius upper limit (NBI) (itv 33,31,3,13)
    • (21) Plasma minor radius lower limit (itv 32)
    • (22) Divertor collisionality upper limit (itv 34,43)
    • (23) Conducting shell to plasma minor radius ratio upper limit (itv 104,1,74)
    • (24) Beta upper limit (itv 36,1,2,3,4,6,18)
    • (25) Peak toroidal field upper limit (itv 35,3,13,29)
    • (26) Central solenoid EOF current density upper limit (ipfres=0) (itv 38,37,41,12)
    • (27) Central solenoid BOP current density upper limit (ipfres=0) (itv 39,37,41,12)
    • (28) Fusion gain Q lower limit (itv 45,47,40)
    • (29) Inboard radial build consistency (itv 3,1,13,16,29,42,61)
    • (30) Injection power upper limit (itv 46,47,11)
    • (31) TF coil case stress upper limit (SCTF) (itv 48,56,57,58,59,60,24)
    • (32) TF coil conduit stress upper limit (SCTF) (itv 49,56,57,58,59,60,24)
    • (33) I_op / I_critical (TF coil) (SCTF) (itv 50,56,57,58,59,60,24)
    • (34) Dump voltage upper limit (SCTF) (itv 51,52,56,57,58,59,60,24)
    • (35) J_winding pack/J_protection upper limit (SCTF) (itv 53,56,57,58,59,60,24)
    • (36) TF coil temperature margin lower limit (SCTF) (itv 54,55,56,57,58,59,60,24)
    • (37) Current drive gamma upper limit (itv 40,47)
    • (38) First wall coolant temperature rise upper limit (itv 62)
    • (39) First wall peak temperature upper limit (itv 63)
    • (40) Start-up injection power lower limit (PULSE) (itv 64)
    • (41) Plasma current ramp-up time lower limit (PULSE) (itv 66,65)
    • (42) Cycle time lower limit (PULSE) (itv 17,67,65)
    • (43) Average centrepost temperature (TART) (consistency equation) (itv 13,20,69,70)
    • (44) Peak centrepost temperature upper limit (TART) (itv 68,69,70)
    • (45) Edge safety factor lower limit (TART) (itv 71,1,2,3)
    • (46) Equation for Ip/Irod upper limit (TART) (itv 72,2,60)
    • (47) NOT USED
    • (48) Poloidal beta upper limit (itv 79,2,3,18)
    • (49) NOT USED
    • (50) IFE repetition rate upper limit (IFE)
    • (51) Startup volt-seconds consistency (PULSE) (itv 16,29,3,1)
    • (52) Tritium breeding ratio lower limit (itv 89,90,91)
    • (53) Neutron fluence on TF coil upper limit (itv 92,93,94)
    • (54) Peak TF coil nuclear heating upper limit (itv 95,93,94)
    • (55) Vacuum vessel helium concentration upper limit iblanket =2 (itv 96,93,94)
    • (56) Pseparatrix/Rmajor upper limit (itv 97,1,3)
    • (57) NOT USED
    • (58) NOT USED
    • (59) Neutral beam shine-through fraction upper limit (NBI) (itv 105,6,19,4 )
    • (60) Central solenoid temperature margin lower limit (SCTF) (itv 106)
    • (61) Minimum availability value (itv 107)
    • (62) taup/taueff the ratio of particle to energy confinement times (itv 110)
    • (63) The number of ITER-like vacuum pumps niterpump < tfno (itv 111)
    • (64) Zeff less than or equal to zeffmax (itv 112)
    • (65) Dump time set by VV loads (itv 56, 113)
    • (66) Limit on rate of change of energy in poloidal field (Use iteration variable 65(tohs), 115)
    • (67) Simple Radiation Wall load limit (itv 116, 4,6)
    • (68) Psep * Bt / qAR upper limit (itv 117)
    • (69) ensure separatrix power = the value from Kallenbach divertor (itv 118)
    • (70) ensure that teomp = separatrix temperature in the pedestal profile, (itv 119 (tesep))
    • (71) ensure that neomp = separatrix density (nesep) x neratio
    • (72) central solenoid shear stress limit (Tresca yield criterion) (itv 123 foh_stress)
    • (73) Psep >= Plh + Paux (itv 137 (fplhsep))
    • (74) TFC quench < tmax_croco (itv 141 (fcqt))
    • (75) TFC current/copper area < Maximum (itv 143 f_coppera_m2)
    • (76) Eich critical separatrix density
    • (77) TF coil current per turn upper limit
    • (78) Reinke criterion impurity fraction lower limit (itv 147 freinke)
    • (79) Peak CS field upper limit (itv 149 fbmaxcs)
    • (80) Divertor power lower limit pdivt (itv 153 fpdivlim)
    • (81) Ne(0) > ne(ped) constraint (itv 154 fne0)
    • (82) toroidalgap > tftort constraint (itv 171 ftoroidalgap)
    • (83) Radial build consistency for stellarators (itv 172 f_avspace)
    • (84) Lower limit for beta (itv 173 fbetatry_lower)
    • (85) Constraint for CP lifetime
    • (86) Constraint for TF coil turn dimension
    • (87) Constraint for cryogenic power
    • (88) Constraint for TF coil strain absolute value
    • (89) Constraint for CS coil quench protection
    • (90) Lower Limit on number of stress load cycles for CS (itr 167 fncycle)
    • (91) Checking if the design point is ECRH ignitable (itv 168 fecrh_ignition)

    ixcintegerNone

    ixc(ipnvars) /0/ : array defining which iteration variables to activate (see lablxc for descriptions)

    lablxccharacterNone

    lablxc(ipnvars) : labels describing iteration variables


    • ( 1) aspect
    • ( 2) bt
    • ( 3) rmajor
    • ( 4) te
    • ( 5) beta
    • ( 6) dene
    • ( 7) rnbeam
    • ( 8) fbeta (f-value for equation 6)
    • ( 9) fdene (f-value for equation 5)
    • (10) hfact
    • (11) pheat
    • (12) oacdcp
    • (13) tfcth (NOT RECOMMENDED)
    • (14) fwalld (f-value for equation 8)
    • (15) fvs (f-value for equation 12)
    • (16) ohcth
    • (17) tdwell
    • (18) q
    • (19) beam_energy
    • (20) tcpav
    • (21) ftburn (f-value for equation 13)
    • (22) NOT USED
    • (23) fcoolcp
    • (24) NOT USED
    • (25) fpnetel (f-value for equation 16)
    • (26) ffuspow (f-value for equation 9)
    • (27) fhldiv (f-value for equation 18)
    • (28) fradpwr (f-value for equation 17), total radiation fraction
    • (29) bore
    • (30) fmva (f-value for equation 19)
    • (31) gapomin
    • (32) frminor (f-value for equation 21)
    • (33) fportsz (f-value for equation 20)
    • (34) fdivcol (f-value for equation 22)
    • (35) fpeakb (f-value for equation 25)
    • (36) fbetatry (f-value for equation 24)
    • (37) coheof
    • (38) fjohc (f-value for equation 26)
    • (39) fjohc0 (f-value for equation 27)
    • (40) fgamcd (f-value for equation 37)
    • (41) fcohbop
    • (42) gapoh
    • (43) NOT USED
    • (44) fvsbrnni
    • (45) fqval (f-value for equation 28)
    • (46) fpinj (f-value for equation 30)
    • (47) feffcd
    • (48) fstrcase (f-value for equation 31)
    • (49) fstrcond (f-value for equation 32)
    • (50) fiooic (f-value for equation 33)
    • (51) fvdump (f-value for equation 34)
    • (52) NOT USED
    • (53) fjprot (f-value for equation 35)
    • (54) ftmargtf (f-value for equation 36)
    • (55) NOT USED
    • (56) tdmptf
    • (57) thkcas
    • (58) thwcndut
    • (59) fcutfsu
    • (60) cpttf
    • (61) gapds
    • (62) fdtmp (f-value for equation 38)
    • (63) ftpeak (f-value for equation 39)
    • (64) fauxmn (f-value for equation 40)
    • (65) tohs
    • (66) ftohs (f-value for equation 41)
    • (67) ftcycl (f-value for equation 42)
    • (68) fptemp (f-value for equation 44)
    • (69) rcool
    • (70) vcool
    • (71) fq (f-value for equation 45)
    • (72) fipir (f-value for equation 46)
    • (73) scrapli
    • (74) scraplo
    • (75) tfootfi
    • (76) NOT USED
    • (77) NOT USED
    • (78) NOT USED
    • (79) fbetap (f-value for equation 48)
    • (80) NOT USED
    • (81) edrive
    • (82) drveff
    • (83) tgain
    • (84) chrad
    • (85) pdrive
    • (86) frrmax (f-value for equation 50)
    • (87) NOT USED
    • (88) NOT USED
    • (89) ftbr (f-value for equation 52)
    • (90) blbuith
    • (91) blbuoth
    • (92) fflutf (f-value for equation 53)
    • (93) shldith
    • (94) shldoth
    • (95) fptfnuc (f-value for equation 54)
    • (96) fvvhe (f-value for equation 55)
    • (97) fpsepr (f-value for equation 56)
    • (98) li6enrich
    • (99) NOT USED
    • (100) NOT USED
    • (101) NOT USED
    • (102) fimpvar # OBSOLETE
    • (103) flhthresh (f-value for equation 15)
    • (104) fcwr (f-value for equation 23)
    • (105) fnbshinef (f-value for equation 59)
    • (106) ftmargoh (f-value for equation 60)
    • (107) favail (f-value for equation 61)
    • (108) breeder_f: Volume of Li4SiO4 / (Volume of Be12Ti + Li4SiO4)
    • (109) ralpne: thermal alpha density / electron density
    • (110) ftaulimit: Lower limit on taup/taueff the ratio of alpha
    • (111) fniterpump: f-value for constraint that number
    • (112) fzeffmax: f-value for max Zeff (f-value for equation 64)
    • (113) ftaucq: f-value for minimum quench time (f-value for equation 65)
    • (114) fw_channel_length: Length of a single first wall channel
    • (115) fpoloidalpower: f-value for max rate of change of
    • (116) fradwall: f-value for radiation wall load limit (eq. 67)
    • (117) fpsepbqar: f-value for Psep*Bt/qar upper limit (eq. 68)
    • (118) fpsep: f-value to ensure separatrix power is less than
    • (119) tesep: separatrix temperature calculated by the Kallenbach divertor model
    • (120) ttarget: Plasma temperature adjacent to divertor sheath [eV]
    • (121) neratio: ratio of mean SOL density at OMP to separatrix density at OMP
    • (122) oh_steel_frac : streel fraction of Central Solenoid
    • (123) foh_stress : f-value for CS coil Tresca yield criterion (f-value for eq. 72)
    • (124) qtargettotal : Power density on target including surface recombination [W/m2]
    • (125) fimp(3) : Beryllium density fraction relative to electron density
    • (126) fimp(4) : Carbon density fraction relative to electron density
    • (127) fimp(5) : Nitrogen fraction relative to electron density
    • (128) fimp(6) : Oxygen density fraction relative to electron density
    • (129) fimp(7) : Neon density fraction relative to electron density
    • (130) fimp(8) : Silicon density fraction relative to electron density
    • (131) fimp(9) : Argon density fraction relative to electron density
    • (132) fimp(10) : Iron density fraction relative to electron density
    • (133) fimp(11) : Nickel density fraction relative to electron density
    • (134) fimp(12) : Krypton density fraction relative to electron density
    • (135) fimp(13) : Xenon density fraction relative to electron density
    • (136) fimp(14) : Tungsten density fraction relative to electron density
    • (137) fplhsep (f-value for equation 73)
    • (138) rebco_thickness : thickness of REBCO layer in tape (m)
    • (139) copper_thick : thickness of copper layer in tape (m)
    • (140) dr_tf_wp : radial thickness of TFC winding pack (m)
    • (141) fcqt : TF coil quench temperature < tmax_croco (f-value for equation 74)
    • (142) nesep : electron density at separatrix [m-3]
    • (143) f_copperA_m2 : TF coil current / copper area < Maximum value
    • (144) fnesep : Eich critical electron density at separatrix
    • (145) fgwped : fraction of Greenwald density to set as pedestal-top density
    • (146) fcpttf : F-value for TF coil current per turn limit (constraint equation 77)
    • (147) freinke : F-value for Reinke detachment criterion (constraint equation 78)
    • (148) fzactual : fraction of impurity at SOL with Reinke detachment criterion
    • (149) fbmaxcs : F-value for max peak CS field (con. 79, itvar 149)
    • (150) REMOVED
    • (151) REMOVED
    • (152) fgwsep : Ratio of separatrix density to Greenwald density
    • (153) fpdivlim : F-value for minimum pdivt (con. 80)
    • (154) fne0 : F-value for ne(0) > ne(ped) (con. 81)
    • (155) pfusife : IFE input fusion power (MW) (ifedrv=3 only)
    • (156) rrin : Input IFE repetition rate (Hz) (ifedrv=3 only)
    • (157) fvssu : F-value for available to required start up flux (con. 51)
    • (158) croco_thick : Thickness of CroCo copper tube (m)
    • (159) ftoroidalgap : F-value for toroidalgap > tftort constraint (con. 82)
    • (160) f_avspace (f-value for equation 83)
    • (161) fbetatry_lower (f-value for equation 84)
    • (162) r_cp_top : Top outer radius of the centropost (ST only) (m)
    • (163) f_t_turn_tf : f-value for TF coils WP trurn squared dimension constraint
    • (164) f_crypmw : f-value for cryogenic plant power
    • (165) fstr_wp : f-value for TF coil strain absolute value
    • (166) f_copperaoh_m2 : CS coil current /copper area < Maximum value
    • (167) fncycle : f-value for minimum CS coil stress load cycles
    • (168) fecrh_ignition: f-value for equation 91
    • (169) te0_ecrh_achievable: Max. achievable electron temperature at ignition point
    • (170) beta_div : field line angle wrt divertor target plate (degrees)
    • (171) casths_fraction : TF side case thickness as fraction of toridal case thickness
    • (172) casths : TF side case thickness [m]
    • (173) EMPTY : Description
    • (174) EMPTY : Description
    • (175) EMPTY : Description

    name_xccharacterNone
    sqsumsqrealNone

    sqsumsq : sqrt of the sum of the square of the constraint residuals

    objf_namecharacterNone

    Description of the objective function

    norm_objfrealNone

    Normalised objective function (figure of merit)

    epsfcnrealNone

    epsfcn /1.0e-3/ : finite difference step length for HYBRD/VMCON derivatives

    epsvmcrealNone

    epsvmc /1.0e-6/ : error tolerance for VMCON

    factorrealNone

    factor /0.1/ : used in HYBRD for first step size

    ftolrealNone

    ftol /1.0e-4/ : error tolerance for HYBRD

    boundlrealNone

    boundl(ipnvars) /../ : lower bounds used on ixc variables during VMCON optimisation runs

    boundurealNone
    bondlrealNone
    bondurealNone
    rcmrealNone
    resdlrealNone
    scafcrealNone
    scalerealNone
    xcmrealNone
    xcsrealNone
    vlamrealNone

    pulse_variables

    Variable nameTypeInitialDescription
    bctmprealNone

    first wall bulk coolant temperature (C)

    dtstorrealNone

    maximum allowable temperature change in stainless steel thermal storage block (K) (istore=3)

    istoreintegerNone

    Switch for thermal storage method:

    • =1 option 1 of Electrowatt report, AEA FUS 205
    • =2 option 2 of Electrowatt report, AEA FUS 205
    • =3 stainless steel block
    itcyclintegerNone

    Switch for first wall axial stress model:

    • =1 total axial constraint, no bending
    • =2 no axial constraint, no bending
    • =3 no axial constraint, bending
    lpulseintegerNone

    Switch for reactor model:

    • =0 continuous operation
    • =1 pulsed operation

    impurity_radiation_module

    Variable nameTypeInitialDescription
    nimpinteger14

    nimp /14/ FIX : number of ion species in impurity radiation model

    coreradiusrealNone

    coreradius /0.6/ : normalised radius defining the 'core' region

    coreradiationfractionrealNone

    coreradiationfraction /1.0/ : fraction of radiation from 'core' region that is subtracted from the loss power

    fimp(nimp) /1.0,0.1,0.02,0.0,0.0,0.0,0.0,0.0,0.0016,0.0,0.0,0.0,0.0,0.0/ : impurity number density fractions relative to electron density

    fimprealNone
    imp_labelcharacterNone

    imp_label(nimp) : impurity ion species names:

    • ( 1) Hydrogen (fraction calculated by code)
    • ( 2) Helium
    • ( 3) Beryllium
    • ( 4) Carbon
    • ( 5) Nitrogen
    • ( 6) Oxygen
    • ( 7) Neon
    • ( 8) Silicon
    • ( 9) Argon
    • (10) Iron
    • (11) Nickel
    • (12) Krypton
    • (13) Xenon
    • (14) Tungsten

    all_array_hotfix_leninteger200
    impurity_arr_LabelcharacterNone
    impurity_arr_ZintegerNone
    impurity_arr_amassrealNone
    impurity_arr_fracrealNone
    impurity_arr_len_tabintegerNone
    impurity_arr_Temp_keVrealNone
    impurity_arr_Lz_Wm3realNone
    impurity_arr_ZavrealNone
    toolowlogicalNone

    Used for reporting error in function pimpden

    ccfe_hcpb_module

    Variable nameTypeInitialDescription
    ipintegerNone
    ofileintegerNone
    armour_densityrealNone

    FW armour density [kg/m3]

    fw_densityrealNone

    FW density [kg/m3]

    blanket_densityrealNone

    Blanket density [kg/m3]

    shield_densityrealNone

    Shield density [kg/m3]

    vv_densityrealNone

    Vacuum vessel density [kg/m3]

    x_blanketrealNone

    Blanket exponent (tonne/m2)

    x_shieldrealNone

    Shield exponent (tonne/m2)

    tfc_nuc_heatingrealNone

    Unit nuclear heating in TF coil (W per W of fusion power)

    fw_armour_u_nuc_heatingrealNone

    Unit heating of FW and armour in FW armour (W/kg per W of fusion power)

    shld_u_nuc_heatingrealNone

    Unit nuclear heating in shield (W per W of fusion power)

    pnuc_tot_blk_sectorrealNone

    Total nuclear power deposited in blanket covered sector (FW, BLKT, SHLD, TF) (MW)

    exp_blanketrealNone

    Exponential factors in nuclear heating calcs

    exp_shield1realNone

    Exponential factors in nuclear heating calcs

    exp_shield2realNone

    Exponential factors in nuclear heating calcs

    fson_string_m

    Variable nameTypeInitialDescription
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    fson_value_m

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    TYPE_NULLinteger0
    TYPE_OBJECTinteger1
    TYPE_ARRAYinteger2
    TYPE_STRINGinteger3
    TYPE_INTEGERinteger4
    TYPE_REALinteger5
    TYPE_LOGICALinteger6

    fson_library

    Variable nameTypeInitialDescription
    end_of_fileinteger-1
    end_of_recordinteger-2
    STATE_LOOKING_FOR_VALUEinteger1
    STATE_IN_OBJECTinteger2
    STATE_IN_PAIR_NAMEinteger3
    STATE_IN_PAIR_VALUEinteger4
    pushed_indexintegerNone
    pushed_charcharacterNone