constraint_eqn_074 Subroutine

   subroutine constraint_eqn_074(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Ensure TF coil quench temperature < tmax_croco ONLY used for croco HTS coil
      !! author: P B Lloyd, CCFE, Culham Science Centre
      !! args : output structure : residual error; constraint value;
      !! residual error in physical units; output string; units string
      !! Ensure TF coil quench temperature < tmax_croco ONLY used for croco HTS coil
      !! #=# physics
      !! #=#=# fcqt, tmax_croco
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! fcqt : input real : f-value: TF coil quench temparature remains below tmax_croco
      !! croco_quench_temperature : input real : CroCo strand: Actual temp reached during a quench (K)
      !! tmax_croco : input real : CroCo strand: maximum permitted temp during a quench (K)
      use constraint_variables, only: fcqt
      use tfcoil_variables, only: croco_quench_temperature, tmax_croco
      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 - fcqt * tmax_croco / croco_quench_temperature
      tmp_con = croco_quench_temperature
      tmp_err = croco_quench_temperature * tmp_cc
      tmp_symbol = '<'
      tmp_units = 'K'

   end subroutine constraint_eqn_074