JAEA-Data/Code 2007-004 - Welcome to Research Group for ...

= 0 (internally set)
19 IHM Total number of rows in the cross-section format
= 0 (internally set)
20 IQOPT Option for input inhomogeneous source;
Qgijn, for g=1,IGM, i=1,IT, j=1,JT, n=1,NMQ
where NMQ = (IQAN+1)(IQAN+2)/2, and IQAN is given by next item.
IT/JT is total number of fine mesh in i/j-direction, equal to the sum of IHX/IHY
vector in Block-5/6.
= 0 No input required; fixed source mode calculation (IC3=3,IEVT=0) or
eigenvalue problems (IC12=3,IEVT>0).
When the fixed source mode calculation is specified, in fast neutron
energy range a fission neutron spectrum of spatially flat and isotropic
source will be supplied automatically. For the thermal neutron range
spatially flat slowing-down source in each zone will be supplied
automatically.
= 1 Enter the energy spectrum GR(g,n) for each angular component n in
Block-7, where spatially flat source is assumed.
Qgijn = GR(g,n)
= 2 Enter an energy spectrum and NMQ sets of spatial shape (in Block-7)
Qgijn = G(g)*R n (i,j), n=1,NMQ
Q(i,j,n,g) = (((Q(i,j,n,g), i=1,IT), j=1,JT), n=1,NMQ), g=1,IGM)
= 3 Enter first a spectrum and a shape IT*JT, then repeat for n. (in Block-7)
Qgijn = G n (g)*R n (i,j), n=1,NMQ
= 4 Enter first a spectrum and an i-direction shape, and a j-direction shape,
then repeat for n. (in Block-7)
Qgijn = G n (g)*X n (i)*Y n (j), n=1,NMQ
= 5 The complete source is read from interface file (FIXSRC) on logical
device 32.
21 IQAN Order of anisotropy of inhomogeneous distributed source
= 0 Isotropic
= L L-th order of anisotropy
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