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*DECK XDRH20
SUBROUTINE XDRH20 (IBIHET,NUN,IR1,NMILG,NREG,NREG2,NG,NSMAX,
1 KEYFLX,NS,IDIL,MIXGR,IBI,FRACT,VOLK,SIGMA,NCO,RRRR,QKOLD,QKDEL,
2 PKL,COEF,SUNKNO,FLUAS)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Calculation of the macro-source for the Hebert or Sanchez-Pomraning
* double heterogeneity model (part 2).
*
*Copyright:
* Copyright (C) 2007 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): A. Hebert
*
*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.
* VOLK volumic fractions of the tubes or shells in the micro volumes.
* SIGMA equivalent total macroscopic cross section in each mixture.
* NCO number of volumes in each composite mixture.
* QKOLD information computed by XDRH11.
* QKDEL information computed by XDRH11 or XDRH12.
* PKL information computed by XDRH11 or XDRH12.
* RRRR information computed by XDRH11 or XDRH12.
* COEF information computed by XDRH11 or XDRH12.
* SUNKNO sources defined in the composite geometry.
*
*Parameters: output
* FLUAS equivalent macro-source.
*
*-----------------------------------------------------------------------
*
*----
* SUBROUTINE ARGUMENTS
*----
INTEGER IBIHET,NUN,IR1,NMILG,NREG,NREG2,NG,NSMAX,KEYFLX(NREG),
1 NS(NG),IDIL(NMILG),MIXGR(NSMAX,NG,NMILG),IBI(NREG2),NCO(NMILG)
REAL FRACT(NG,IR1+NMILG),VOLK(NG,NSMAX),SIGMA(0:IR1+NMILG),
1 RRRR(NMILG),QKOLD(NG,NSMAX,NMILG),QKDEL(NG,NSMAX,NMILG),
2 PKL(NG,NSMAX,NSMAX,NMILG),SUNKNO(NUN),FLUAS(NREG2)
DOUBLE PRECISION COEF(1+NG*NSMAX,1+NG*NSMAX,NMILG)
*----
* LOCAL VARIABLES
*----
DOUBLE PRECISION DP0,DDOT
DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:) :: RHS
*----
* SCRATCH STORAGE ALLOCATION
*----
ALLOCATE(RHS(1+NG*NSMAX))
*
IF(IBIHET.EQ.1) THEN
GO TO 10
ELSE IF(IBIHET.EQ.2) THEN
GO TO 60
ELSE
CALL XABORT('XDRH20: INVALID DOUBLE HETEROGENEITY METHOD.')
ENDIF
*----
* COMPUTE THE EQUIVALENT MACRO-SOURCE (SANCHEZ-POMRANING METHOD).
*----
10 IND1=NREG2
DO 50 I=1,NREG2
MIL=IBI(I)
IF(MIL.GT.IR1) THEN
IBM=MIL-IR1
INDGAR=IND1
DILF=1.0
DP0=0.0D0
DO 30 J=1,NG
FRT=FRACT(J,MIL)
DILF=DILF-FRT
IF(FRT.LE.0.00001) GO TO 30
DO 20 K=1,NS(J)
DP0=DP0+FRT*VOLK(J,K)*QKOLD(J,K,IBM)*SIGMA(MIXGR(K,J,IBM))
20 CONTINUE
IND1=IND1+NS(J)
30 CONTINUE
DP0=DP0+DILF*SIGMA(IDIL(IBM))
RHS(1)=DILF*SUNKNO(KEYFLX(I))/DP0
IND1=INDGAR
IND2=1
DO 40 J=1,NG
FRT=FRACT(J,MIL)
IF(FRT.LE.0.00001) GO TO 40
DO K=1,NS(J)
IUNK=KEYFLX(IND1+K)
RHS(1)=RHS(1)+FRT*VOLK(J,K)*QKOLD(J,K,IBM)*SUNKNO(IUNK)/DP0
RHS(IND2+K)=0.0D0
DO N=1,NS(J)
IUNK=KEYFLX(IND1+N)
RHS(IND2+K)=RHS(IND2+K)+PKL(J,K,N,IBM)*SUNKNO(IUNK)
ENDDO
ENDDO
IND1=IND1+NS(J)
IND2=IND2+NS(J)
40 CONTINUE
DP0=DDOT(NCO(IBM),COEF(1,1,IBM),1+NG*NSMAX,RHS,1)
FLUAS(I)=REAL(DP0)*SIGMA(IBI(I))*RRRR(IBM)
ELSE
FLUAS(I)=SUNKNO(KEYFLX(I))
ENDIF
50 CONTINUE
RETURN
*----
* COMPUTE THE EQUIVALENT MACRO-SOURCE (HEBERT METHOD).
*----
60 IND1=NREG2
DO 100 I=1,NREG2
MIL=IBI(I)
IF(MIL.GT.IR1) THEN
IBM=MIL-IR1
INDGAR=IND1
DILF=1.0
DP0=0.0D0
DO 80 J=1,NG
FRT=FRACT(J,MIL)
DILF=DILF-FRT
IF(FRT.LE.0.00001) GO TO 80
DO 70 K=1,NS(J)
DP0=DP0+FRT*VOLK(J,K)*QKDEL(J,K,IBM)*SIGMA(MIXGR(K,J,IBM))
70 CONTINUE
IND1=IND1+NS(J)
80 CONTINUE
DP0=DP0+DILF*SIGMA(IDIL(IBM))
RHS(1)=DILF*SUNKNO(KEYFLX(I))/DP0
IND1=INDGAR
IND2=1
DO 90 J=1,NG
FRT=FRACT(J,MIL)
IF(FRT.LE.0.00001) GO TO 90
DO K=1,NS(J)
IUNK=KEYFLX(IND1+K)
RHS(1)=RHS(1)+FRT*VOLK(J,K)*QKDEL(J,K,IBM)*SUNKNO(IUNK)/DP0
RHS(IND2+K)=0.0D0
DO N=1,NS(J)
IUNK=KEYFLX(IND1+N)
RHS(IND2+K)=RHS(IND2+K)+PKL(J,K,N,IBM)*SUNKNO(IUNK)
ENDDO
ENDDO
IND1=IND1+NS(J)
IND2=IND2+NS(J)
90 CONTINUE
DP0=DDOT(NCO(IBM),COEF(1,1,IBM),1+NG*NSMAX,RHS,1)
FLUAS(I)=REAL(DP0)*SIGMA(IBI(I))
ELSE
FLUAS(I)=SUNKNO(KEYFLX(I))
ENDIF
100 CONTINUE
*----
* SCRATCH STORAGE DEALLOCATION
*----
DEALLOCATE(RHS)
RETURN
END
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