Keyword:SSFFUEL

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SSFFUEL n1
is(j) atoms(j) j=1,n1


This keyword allows the input of the number n1 of nuclides with the identifier is(j) and the number of atoms atoms(j) for each nuclide that is to be used in the self-shielding calculation. The identifier should be a nuclide name with the format of a chemical symbol followed by an atomic mass number, e.g. W184. The specification of nuclides is essential if the materials speci ed do not have the natural isotopic abundance. If different values are required then SSFFUEL should be used.

Note that SSFFUEL and SSFMASS must not both be used in a particular case.

An example of the use of this keyword is

Example usage:

< -- Control phase -- >
...
GETXS 1 709
PROBTAB 1 0
SSFCHOOSE 4 0
 W182 W183 W184 W186
SSFFUEL 4
 W182 1.34834187E+22
 W183 7.27597094E+21
 W184 1.55899050E+22
 W186 1.44654079E+22
FISPACT
* COLLAPSE tal-n/gxs-709 with tp-709-294
< -- Initial phase -- > 
...
< -- Inventory phase -- > 
...