constraint_eqn_054 Subroutine

   subroutine constraint_eqn_054(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for peak TF coil nuclear heating 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 peak TF coil nuclear heating upper limit
      !! #=# fwbs
      !! #=#=# fptfnuc, ptfnucmax
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! fptfnuc : input real : f-value for maximum TF coil nuclear heating
      !! ptfnucmax : input real :  maximum nuclear heating in TF coil (MW/m3)
      !! ptfnucpm3 : input real :  nuclear heating in the TF coil (MW/m3) (blktmodel>0)
      use constraint_variables, only: fptfnuc, ptfnucmax
      use fwbs_variables, only: ptfnucpm3
      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 - fptfnuc * ptfnucmax/ptfnucpm3
      tmp_con = ptfnucmax * (1.0D0 - tmp_cc)
      tmp_err = ptfnucpm3 * tmp_cc
      tmp_symbol = '<'
      tmp_units = 'MW/m3'

   end subroutine constraint_eqn_054