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*DECK XDRH23
SUBROUTINE XDRH23 (IBIHET,NUN,IR1,NMILG,NREG,NREG2,NG,NSMAX,
1 KEYFLX,NS,IDIL,MIXGR,IBI,FRACT,SIGMA,P1I,P1DI,P1KI,SIGA1,SUNKNO,
2 FLUAS)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Calculation of the macro-source for the She-Liu-Shi double
* heterogeneity model (part 2).
*
*Copyright:
* Copyright (C) 2019 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): R. Chambon
*
*Parameters: input
* IBIHET type of double-heterogeneity method (=1 Sanchez-Pomraning
* model; =2 Hebert model).
* NUN number of unknown in the system.
* IR1 number of mixtures in the domain.
* NMILG number of composite mixtures in the domain.
* NREG number of volumes in the composite geometry.
* NREG2 number of volumes in the macro geometry.
* NG number of different kind of micro structures. A kind of
* micro structure is characterized by the radius of its
* micro volumes. All the micro volumes of the same kind
* should own the same nuclear properties in a given macro
* volume.
* NSMAX maximum number of volumes (tubes or shells) in each kind of
* micro structure.
* KEYFLX flux elements in unknown system.
* NS number of volumes in each kind of micro structure.
* IDIL elementary mixture indices in the diluent of the composite
* mixtures.
* MIXGR elementary mixture indices in the micro structures.
* IBI type of mixture in each volume of the macro geometry.
* If IBI(IKK) is greater than IR1, the volume IKK contains a
* micro structure.
* FRACT volumic fractions of the micro volumes.
* SIGMA equivalent total macroscopic cross section in each mixture.
* P1I non collision probability in subvolume with 1 grain type.
* P1KI escape probability from layer k in subvolume
* with 1 grain type.
* P1DI escape probability from matrix in subvolume
* with 1 grain type.
* SIGA1 equiv. total macro. XS with 1 grain type.
* SUNKNO sources defined in the composite geometry.
*
*Parameters: output
* FLUAS equivalent macro-source.
*
*-----------------------------------------------------------------------
*
IMPLICIT NONE
*----
* SUBROUTINE ARGUMENTS
*----
INTEGER IBIHET,NUN,IR1,NMILG,NREG,NREG2,NG,NSMAX,KEYFLX(NREG),
1 NS(NG),IDIL(NMILG),MIXGR(NSMAX,NG,NMILG),IBI(NREG2)
REAL FRACT(NG,IR1+NMILG),SIGMA(0:IR1+NMILG),P1I(NG,NMILG),
1 P1DI(NG,NMILG),P1KI(NSMAX,NG,NMILG),SIGA1(NG,NMILG),
2 SUNKNO(NUN),FLUAS(NREG2)
*----
* LOCAL VARIABLES
*----
INTEGER IND1,I,MIL,K,J,IBM,IUNK
REAL Q1I,DILF,FRT
*----
* SCRATCH STORAGE ALLOCATION
*----
IF(IBIHET.NE.3) THEN
CALL XABORT('XDRH23: INVALID DOUBLE HETEROGENEITY METHOD.')
ENDIF
*----
* COMPUTE THE EQUIVALENT MACRO-SOURCE (SLS METHOD).
*----
IND1=NREG2
DO 60 I=1,NREG2
MIL=IBI(I)
IF(MIL.GT.IR1) THEN
FLUAS(I)=0.0
IBM=MIL-IR1
DILF=1.0
Q1I=0.0
DO 30 J=1,NG
FRT=FRACT(J,MIL)
DILF=DILF-FRT
30 CONTINUE
DO 50 J=1,NG
FRT=FRACT(J,MIL)
IF(FRT.LE.0.00001) GO TO 40
Q1I=P1DI(J,IBM)/(1.0-P1I(J,IBM))*SUNKNO(KEYFLX(I))
> *SIGA1(J,IBM)/SIGMA(IDIL(IBM))
DO K=1,NS(J)
IUNK=KEYFLX(IND1+K)
Q1I=Q1I+P1KI(K,J,IBM)/(1.0-P1I(J,IBM))*SUNKNO(IUNK)
> *SIGA1(J,IBM)/SIGMA(MIXGR(K,J,IBM))
ENDDO
IND1=IND1+NS(J)
40 FLUAS(I)=FLUAS(I)+Q1I*FRT
50 CONTINUE
FLUAS(I)=FLUAS(I)/(1.0-DILF)
ELSE
FLUAS(I)=SUNKNO(KEYFLX(I))
ENDIF
60 CONTINUE
*----
* SCRATCH STORAGE DEALLOCATION
*----
RETURN
END
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