constraint_eqn_053 Subroutine

   subroutine constraint_eqn_053(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for fast neutron fluence on TF coil upper limit
      !! author: P B Lloyd, CCFE, Culham Science Centre
      !! args : output structure : residual error; constraint value;
      !! residual error in physical units; output string; units string
      !! Equation for fast neutron fluence on TF coil upper limit
      !! #=# fwbs
      !! #=#=# fflutf, nflutfmax
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! fflutf : input real : f-value for maximum TF coil nuclear heating
      !! nflutfmax : input real :  max fast neutron fluence on TF coil (n/m2)
      !! nflutf : input real :  peak fast neutron fluence on TF coil superconductor (n/m2)
      use constraint_variables, only: fflutf, nflutfmax
      use fwbs_variables, only: nflutf
      implicit none
            real(dp), intent(out) :: tmp_cc
      real(dp), intent(out) :: tmp_con
      real(dp), intent(out) :: tmp_err
      character(len=1), intent(out) :: tmp_symbol
      character(len=10), intent(out) :: tmp_units

      tmp_cc =  1.0D0 - fflutf * nflutfmax/nflutf
      tmp_con = nflutfmax * (1.0D0 - tmp_cc)
      tmp_err = nflutf * tmp_cc
      tmp_symbol = '<'
      tmp_units = 'neutron/m2'

   end subroutine constraint_eqn_053