Difference between revisions of "Critical density iteration"

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(Output)
(Output)
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== Output ==
 
== Output ==
  
An output variable <tt>ITER_NUC_FACTOR</tt> is included in the main <tt>[INPUT]_res.m</tt> results file.
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An output variable <tt>ITER_NUC_FACTOR</tt> is included in the main <tt>[INPUT]_res.m</tt> results file. The output variable gives the mean multiplicative scaling factor applied to the iterated nuclides to achieve a critical system.
  
 
== Operation ==
 
== Operation ==

Revision as of 10:10, 3 March 2017

Input

iternuc NZAI ZAI1 ZAI2 ... ZAINZAI [ NMAT MAT1 MAT2 ... MAXNMAT ]
NZAI  : number of different nuclides (ZAI) included in the iteration
ZAIi  : the ZAI (e.g. 50100 for boron 10 ground state) of the nuclide to be included in the iteration
NMAT  : number of different materials included in the iteration (optional parameter)
MATi  : the name of the material to be included in the iteration

Notes:

  • If a list of materials is not given, all materials that contain the included nuclides are included in the iteration.
  • The initial concentration of the nuclides to be iterated should be larger than zero.
  • The critical concentration iteration currently only works for nuclides that have a reactivity effect mainly through neutron absorption. Specifically, critical concentrations of fissile, moderating or reflecting nuclides cannot be iterated using this card.

Output

An output variable ITER_NUC_FACTOR is included in the main [INPUT]_res.m results file. The output variable gives the mean multiplicative scaling factor applied to the iterated nuclides to achieve a critical system.

Operation