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MACROWRK file.
2 INTSTP Step number to read the composition. Enter 0 if the burn-up step tag (b-tag) is ’0’.
The b-tags (cf. Sect.2.9) correspond to burn-up step numbers as:
(b-tag=0, 1,…,9, A, B,…,Z, a, b,….,z ⇒ 0, 1,….,9, 10, 11, …35, 36, 37,....,61)
Block-7-1 Required if IBC5=1 /2/
1 NFIS Number of nuclides to contribute to depletion of fissile nuclides
See Eq.(2.11-3) and burn-up chain model (cf. Sect.3.3)
2 NFER Number of nuclides to contribute to production of fissile nuclides
See Eq.(2.11-2) and burn-up chain model (cf. Sect.3.3)
Block-7-2 Required if IBC5=1 /A4, 1, 1/
1 NAMFIS Nuclide name and reaction type to contribute to depletion of fissile nuclides by 4
characters. The first 3 characters are for nuclide name and the fourth character for
reaction type (Fission/ Capture/ Absorption/ N2N/ Decay). Enter as ‘U05A’,
‘U08C’, ‘PU1D’. If ‘D’ is specified, contribution of decay is included in the
calculation of conversion ratio whereas this contribution is not taken into account
for the tabulated absorption cross-section of fissile material (
fissile
Σ a,g
) to be stored in
MACRO file.
Note:
Nuclide name and reaction type should be appropriately selected by taking into
account the burn-up chain model used in the calculation. (cf. Sect.3.3)
The fissile absorption cross-section (
conversion ratio.
fissile
Σ a,g
) is used by COREBN to calculate
2 IFISFLG
= 0 Do not multiply atomic number density of this nuclide (microscopic
cross-sections are used)
= 1 Multiply atomic number density of this nuclide (macroscopic
cross-sections are used)
3 FISFACT The factor to indicate sign or branching ratio. If Block-7-2 are entered as below, the
summation of the values in parentheses is defined as the depletion rate of fissile
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