A VARIATIONAL PROCEDURE FOR CALCULATING FAST FEW-GROUP CONSTANTS
Technical Report
·
OSTI ID:4769165
A variational procedure for calculating fast-energy fewgroup constants is described. For a given medium, the method permits the flux and current solutions of the Boltzmann equation, treated according to P-1 slowing-down theory in each group of a few-group scheme as a linear combination of two base flux spectra to be expressed, the group flux to be obtained, and as a linear combination of two base current spectra, the group current to be obtained. The coefficients for combining the base spectra are provided by the theory and depend only on the concentrations of the component elements of the medium. Once the flux and current spectra in each group are calculated, the group constants for the medium can be easily calculated from baseflux-spectra weighted library microscopic cross sections. Group constants calculated in this manner agree well with those obtained from the MUFT 5 program. (auth)
- Research Organization:
- Knolls Atomic Power Lab., Schenectady, N.Y.
- DOE Contract Number:
- W-31-109-ENG-52
- NSA Number:
- NSA-17-005298
- OSTI ID:
- 4769165
- Report Number(s):
- KAPL-2220
- Country of Publication:
- United States
- Language:
- English
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