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*DECK LIBSEC
SUBROUTINE LIBSEC(MAXTRA,LLL,IANNN,NGRO,IX,UUU,DELTA,SIGS,SIG1,
1 PRI,NLET,STR,DEL,NRSTR,IANIS,ITY,NEXT,NEXU,NEXV,NEXW,III)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Compute the values of the transfer macroscopic cross section for
* secondary neutrons in group LLL. Component of the APOLIB-1 reader.
*
*Copyright:
* Copyright (C) 2002 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
* MAXTRA available storage for apollo compacted transfer
* cross sections.
* LLL group number for secondary neutrons.
* IANNN type of transport correction (=-1: transport corrected P0;
* =0: P0; =1: P1).
* NGRO number of groups.
* IX number of groups with up-scattering.
* UUU groups limits in lethargy units.
* DELTA groups width in lethargy units.
* SIGS diffusion P0 microscopic cross sections.
* SIG1 diffusion P1 microscopic cross sections.
* PRI transfer microscopic cross sections.
* DEL elementary mesh element in lethargy.
* NRSTR number of cross section structures own by the isotope.
* IANIS Legendre order corresponding to each cross section structure.
* ITY type of each cross section structure.
* NEXT length of each cross section structure.
* NEXU information related to each cross section structure.
* NEXV information related to each cross section structure.
* NEXW information related to each cross section structure.
* III offset in vector PRI of each cross section structure.
*
*Parameters: output
* NLET number of down-scattering groups (including group LLL).
* STR values of the transfer macroscopic cross section:
* STR(1) from group LLL;
* STR(2) from group LLL-1;
* STR(LLL) from group 1;
* STR(LLL+1) from group NGRO;
* STR(LLL+2) from group NGRO-1;
* STR(NGRO) from group LLL+1.
*
*-----------------------------------------------------------------------
*
*----
* SUBROUTINE ARGUMENTS
*----
INTEGER MAXTRA,LLL,IANNN,NGRO,IX,NLET,NRSTR,IANIS(80),ITY(80),
1 NEXT(80),NEXU(80),NEXV(80),NEXW(80),III(80)
REAL UUU(NGRO),DELTA(NGRO),SIGS(NGRO),SIG1(NGRO),PRI(MAXTRA),
1 STR(NGRO),DEL
*----
* LOCAL VARIABLES
*----
DOUBLE PRECISION DAUX
LOGICAL SELF
EQUIVALENCE(AUX1,K12)
*
NGROIN=NGRO-IX
IAN=IANNN
IF(IANNN.EQ.-1)IAN=0
DO 71 MM=1,NGRO
STR(MM)=0.0
71 CONTINUE
NLET=1
SELF=.FALSE.
IF (NRSTR.GT.0) THEN
DO 250 K=1,NRSTR
IF (IANIS(K).NE.IAN) GOTO 250
MML=0
IF (ITY(K).EQ.1) THEN
* ELASTIC SLOWING-DOWN MATRIX.
IF (LLL.GT.NGROIN) GO TO 250
SELF=.TRUE.
LDELH=INT(UUU(LLL)/DEL+0.1)
LARGRL=INT(DELTA(LLL)/DEL+0.1)
LDELB=LDELH-LARGRL+1
NP2=NEXT(K)
IHM=III(K)+NP2-1
LTES=LDELB-NP2
ISOTOP=K
INDICE=1
DO 210 MM1=1,LLL
MM=LLL-MM1+1
MDELH=INT(UUU(MM)/DEL+0.1)
IF(MDELH.LE.LTES)GOTO 211
LARGRM=INT(DELTA(MM)/DEL+0.1)
MDELB=MDELH-LARGRM+1
MDELB=MAX0(MDELB,LTES+1)
DAUX=0.0
LARG=MIN0(LARGRM,LARGRL)
IF(LARG.GT.4) THEN
IHAUT=LDELH-MDELB+III(K)
IHAUT=MIN0(IHAUT,IHM)
J=0
INTER2=0
IF (INDICE.EQ.2) THEN
IBAS=LDELB-MDELH+III(K)
IBAS=MAX0(IBAS,III(K))
LARGLI=IABS(LARGRM-LARGRL)
INTER1=IBAS+LARG-2
INTER1=MIN0(INTER1,IHAUT)
DO 182 I=IBAS,INTER1
J=J+1
DAUX=DAUX+PRI(I)*FLOAT(J)
182 CONTINUE
INTER1=INTER1+1
INTER2=INTER1+LARGLI
INTER2=MIN0(IHAUT,INTER2)
IF(INTER1.GT.INTER2) GO TO 1004
J=LARG
DO 183 I=INTER1,INTER2
DAUX=DAUX+PRI(I)*FLOAT(LARG)
183 CONTINUE
ELSE IF (INDICE.EQ.1) THEN
INDICE=2
INTER2=III(K)-1
J=LARG+1
ENDIF
INTER2=INTER2+1
DO 184 I=INTER2,IHAUT
J=J-1
DAUX=DAUX+PRI(I)*FLOAT(J)
184 CONTINUE
ELSE
DO 83 MDEL=MDELB,MDELH
IBAS=LDELB-MDEL+III(K)
IHAUT=LDELH-MDEL+III(K)
IBAS=MAX0(IBAS,III(K))
IHAUT=MIN0(IHAUT,IHM)
DO 82 I=IBAS,IHAUT
DAUX=DAUX+PRI(I)
82 CONTINUE
83 CONTINUE
ENDIF
1004 STR(MM1)=STR(MM1)+REAL(DAUX*SIGS(MM)*DEL/DELTA(LLL))
210 CONTINUE
MM=MM-1
211 MML=LLL-MM
ELSE IF (ITY(K).EQ.4) THEN
* STANDARD GALOCHE.
IF (LLL.GT.NGROIN) GO TO 250
SELF=.TRUE.
NEX1=NEXU(K)
NEX2=NEXV(K)
NEX3=NEXW(K)
IF(LLL.GT.(NEX2+NEX3)) GO TO 801
IPR=III(K)-1+(LLL*(LLL-1))/2
DO 802 I=1,LLL
IPR=IPR+1
STR(I)=STR(I)+PRI(IPR)
802 CONTINUE
MML=LLL
GO TO 240
801 IF(LLL.GT.NEX1) GO TO 803
IPR=III(K)-1+LLL*(NEX2+NEX3)-((NEX2+NEX3)*(NEX2+NEX3+1))/2
DO 804 I=1,NEX2
IPR=IPR+1
STR(I)=STR(I)+PRI(IPR)
804 CONTINUE
LN3=LLL-NEX3+1
DO 807 I=LN3,LLL
IPR=IPR+1
STR(I)=STR(I)+PRI(IPR)
807 CONTINUE
MML=LLL
GO TO 240
803 IF(NEX2.EQ.0) GO TO 250
IPR=III(K)-1+NEX1*NEX3-((NEX2+NEX3)*(NEX2+NEX3-1))/2+
1 (LLL-1)*NEX2
DO 813 I=1,NEX2
IPR=IPR+1
STR(I)=STR(I)+PRI(IPR)
813 CONTINUE
MML=NEX2
ELSE IF (ITY(K).EQ.7) THEN
* THERMAL TRANSFER MATRIX.
IF (LLL.LE.NGROIN) GO TO 250
SELF=.TRUE.
IPR=III(K)-1+(NGRO-LLL)*IX
DO 5003 MM=1,LLL-NGROIN
STR(MM)=STR(MM)+PRI(IPR+MM+NGRO-LLL)
5003 CONTINUE
DO 5004 MM=1,NGRO-LLL
STR(MM+LLL)=STR(MM+LLL)+PRI(IPR+MM)
5004 CONTINUE
MML=LLL-NGROIN
ELSE IF (ITY(K).EQ.8) THEN
* RECTANGLE SLOWING-DOWN MATRIX.
IF(LLL.LT.NEXU(K))GO TO 250
IF(LLL.GT.NEXV(K))GO TO 250
IPR=III(K)-1+(LLL-NEXU(K))*NEXW(K)
LN1=LLL-NEXU(K)+2
DO 355 I=LN1,LN1+NEXW(K)-1
IPR=IPR+1
STR(I)=STR(I)+PRI(IPR)
355 CONTINUE
MML=NEXW(K)+LLL-NEXU(K)+1
ELSE IF (ITY(K).EQ.9) THEN
* GREULING-GOERTZEL SLOWING DOWN MATRIX.
NEX1=NEXU(K)
NEX3=NEXW(K)
IF ((LLL.LT.NEX1).OR.(LLL.GT.NEX3)) GO TO 250
SELF=.TRUE.
NEX2=NEXV(K)
NEX4=NEXT(K)/3
MML=LLL-NEX1+1
IPR=NEX3-LLL+III(K)-1
J=IPR+1+NEX4
DAUX=PRI(J)
J=IPR+1+2*NEX4
IF(LLL.GT.NEX2) THEN
LN1=LLL-NEX2+1
ELSE
LN1=1
STR(1)=STR(1)+PRI(J)
ENDIF
J=IPR+LN1-1
DO 360 MM=LN1,MML
J=J+1
STR(MM)=STR(MM)+REAL(PRI(J)*DAUX)
360 CONTINUE
ENDIF
240 NLET=MAX0(NLET,MML)
250 CONTINUE
ENDIF
IF ((.NOT.SELF).AND.(IAN.EQ.0)) THEN
STR(1)=STR(1)+SIGS(LLL)
ELSE IF ((.NOT.SELF).AND.(IAN.EQ.1)) THEN
STR(1)=STR(1)+3.0*SIG1(LLL)
ENDIF
IF (IANNN.EQ.-1) THEN
STR(1)=STR(1)-SIG1(LLL)
ENDIF
RETURN
END
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