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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
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