constraint_eqn_078 Subroutine

   subroutine constraint_eqn_078(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for Reinke criterion, divertor impurity fraction lower 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 Reinke criterion, divertor impurity fraction lower limit
      !! #=# divertor
      !! #=#=# freinke, fzactual, fzmin
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present;
      !! and con will be printed out only if present. Thesw conditions were missing.
      !! freinke : input : f-value for Reinke criterion (itv 147)
      !! fzmin : input : minimum impurity fraction from Reinke model
      !! fzactual : input : actual impurity fraction
      use constraint_variables, only: freinke
      use reinke_variables, only: fzactual, fzmin
      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

      ! write(*,*) 'freinke, fzact, fzmin = ', freinke, ', ', fzactual, ', ', fzmin
      !            1.0,    0.0,   value
      tmp_cc = 1.0D0 - freinke *  fzactual/fzmin
      !The following two pre-existing lines are not understood:
      !KE note - cc is always 1, code never enters IF statement...
      tmp_con = fzmin * (1.0D0 - tmp_cc)
      tmp_err = fzmin * tmp_cc
      tmp_symbol = '>'
      tmp_units  = ''
      ! write(*,*) 'cc, con = ', tmp_cc, ', ', tmp_con
      ! write(*,*) 'freinke, fzactual, fzmin = ', freinke, ', ', fzactual, ', ', fzmin

   end subroutine constraint_eqn_078