What is the meaning of 'kappa' in Parcs cross-section input files?

AI Thread Summary
In the context of BWR-transient calculations, the user is converting cross-sections from PSG2/Serpent simulations for use in Parcs input files. They seek clarification on the term "kappa" in the context of kappa-fission cross sections, which is associated with local power density. The user assumes "Nu" refers to the neutron-fission event ratio multiplied by the fission cross section. They also request documentation or insights on Parcs cross-section input files, referencing a specific thesis for further information on the definition of kappa. Understanding these terms is crucial for accurate modeling in reactor simulations.
SebastianF
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Background:
For a BWR-transient calculation I'm trying to convert cross-sections I got from PSG2/Serpent simulations in Parcs [CrossSection] Input files.

My Question:
Parcs makes use of
SNF Nu-fission cross section​
SKF Kappa-fission cross section​

I assume this means Nu (as in neutrons/fission-event times fission cross section) but I'm not familiar with kappa in this context. Anyone have an idea what it denotes?

P.S.
Any and all documentation or insights about parcs cross-section input files would be more than welcome.
 
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There is a definition of kappa-fission in this thesis.
http://www.lib.ncsu.edu/theses/available/etd-03012005-134843/unrestricted/etd.pdf

Just search on kappa (see page 27/127 of the pdf, or page 17, eq. 4.2d), where kappa is related to the local power density.
 
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