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

use the case name of the previous case. (e.g. CELL, TYP1, PWR1 etc.), together
with x-tag.
Otherwise, mmmm-tag is used as the former half of member name on
MACROWRK file to discriminate the member for a mixture. Therefore, do not use
more than once the same mmmm-tag in a case. In a run of consecutive cases, if the
same mmmm-tag appearing in the previous case is used in the succeeding case,
even if the new composition is given, the formation of cross-sections is skipped
and those formed in the previous case are used in the latter case. Exactly speaking,
x-tag described later is also used for the discrimination. In this sense, the same
mmmm-tag may be used for different mixtures.
e-tag
Tag internally used to specify the neutron energy range of a set of macroscopic
cross-sections, because the sets for fast and thermal energy range are separately
composed and later concatenated into the set for whole energy range. The code
‘F‘ for fast, ‘T’ for thermal, ‘A’ for whole energy range is assigned, respectively.
The user can confirm it from the member list of MACROWRK file.
b-tag
Tag to indicate burn-up step as ‘0’ , ‘1’, ‘2’, .....,’9’ and ‘A’, ‘B’,...,’Z’, ‘a’, ‘b’, …
and ’z’ corresponding to fresh, steps 1, 2.....,’9’ and 10, 11,..., 35, 36, 37, … and 61,
respectively, when the cell burn-up calculation is done to make up this mixture.
Otherwise this tag is filled by the character given in the input.
When the user wants to refer the cross-sections obtained in a series of burn-up
calculations, he can specify the burn-up step by using this tag.
x-tag
x-tag has different function depending on whether the former half of member name
is case name or mixture name.
Enter an alphameric character (1, 2,….,9, A, B, …) corresponding to X-Region
number to specify an X-Region among a set of homogenized cross-sections formed
in the previous case.
When a set of mixture cross-sections are newly formed by giving composition in
this case, any character entered for this tag is used as the seventh character of the
mixture name.
In the latter case, this tag is also used to discriminate the effective microscopic
cross-sections stored in the MICREF file when a resonant nuclide is commonly
used in more than one mixture. e.g., the microscopic cross-sections of 238 U in UO 2
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