Merge pull request #8113 from mcgratta/master

FDS Source: Fix bug initializing CHI_R

Author: mcgratta

Diff for: Source/init.f90

@@ -291,7 +291,11 @@ SUBROUTINE INITIALIZE_MESH_VARIABLES_1(DT,NM)
 IF (.NOT.EVACUATION_ONLY(NM)) THEN
    ALLOCATE(M%CHI_R(0:IBP1,0:JBP1,0:KBP1),STAT=IZERO)
    CALL ChkMemErr('INIT','QR',IZERO)
-   M%CHI_R = MAX(0._EB,RADIATIVE_FRACTION*EVALUATE_RAMP(T_BEGIN,0._EB,REACTION(1)%RAMP_CHI_R_INDEX))
+   IF (N_REACTIONS>0) THEN
+      M%CHI_R = MAX(0._EB,RADIATIVE_FRACTION*EVALUATE_RAMP(T_BEGIN,0._EB,REACTION(1)%RAMP_CHI_R_INDEX))
+   ELSE
+      M%CHI_R = MAX(0._EB,RADIATIVE_FRACTION)
+   ENDIF
    ALLOCATE(M%QR(0:IBP1,0:JBP1,0:KBP1),STAT=IZERO)
    CALL ChkMemErr('INIT','QR',IZERO)
    M%QR = 0._EB