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+*DECK INFPSA
+ SUBROUTINE INFPSA(IPRINT,TEMPK,PURWGT,PRES)
+*
+*-----------------------------------------------------------------------
+*
+*Purpose:
+* Compute pressure at saturation for a mixture of light and heavy water.
+*
+*Copyright:
+* Copyright (C) 2016 Ecole Polytechnique de Montreal
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation; either
+* version 2.1 of the License, or (at your option) any later version.
+*
+*Author(s): C. Kieffer and G. Marleau
+*
+*Parameters: input
+* IPRINT print parameter.
+* TEMPK temperature (kelvin).
+* PURWGT D2O purity (in wgt%).
+*
+*Parameters: output
+* PRES pressure (Pa).
+*
+*-----------------------------------------------------------------------
+*
+ IMPLICIT NONE
+*----
+* SUBROUTINE ARGUMENTS
+*----
+ INTEGER IPRINT
+ REAL TEMPK,PURWGT,PRES
+*----
+* LOCAL VARIABLES
+*----
+ INTEGER IOUT
+ CHARACTER NAMSBR*6
+ PARAMETER (IOUT=6,NAMSBR='INFPSA')
+ REAL PD2O,PH2O,WGTD2O,WGTH2O,WGID2O,WGIH2O
+ IF(IPRINT .GE. 10) THEN
+ WRITE(IOUT,6000) NAMSBR
+ ENDIF
+*----
+* For heavy water, T limited to 90.5 C < T < 358.5 C
+*----
+ WGTD2O = 0.01 * PURWGT
+ WGTH2O = 1.00 - WGTD2O
+ IF(PURWGT .LT. 1.0) THEN
+ CALL THMSAP(PH2O,TEMPK)
+ WGIH2O=WGTH2O/PH2O
+ ELSE
+ PH2O=0.0
+ WGIH2O=0.0
+ ENDIF
+ IF(PURWGT .GT. 0.0) THEN
+ CALL THMHSP(PD2O,TEMPK)
+ IF(PD2O .GT. 0.0) THEN
+ WGID2O=WGTD2O/PD2O
+ ELSE
+ WGID2O=WGTD2O/PH2O
+ ENDIF
+ ELSE
+ WGID2O=0.0
+ ENDIF
+ PRES = 1.0 /( WGIH2O +WGID2O ) + 0.01
+*----
+* Processing finished, return
+*----
+ IF(IPRINT .GE. -10) THEN
+ WRITE(IOUT,*) 'Saturation pressure (Pa)', PRES
+ WRITE(IOUT,6001) NAMSBR
+ ENDIF
+ RETURN
+*----
+* Output formats
+*----
+ 6000 FORMAT('(* Output from --',A6,'-- follows ')
+ 6001 FORMAT(' Output from --',A6,'-- completed *)')
+ END