Calculation of Multigroup Constants in WIMS Format with Programs Fedgroup and Flange and Comparison of the Results Obtained Using Different Evaluated Libraries

摘要

Multigroup constants for 1-H-1, 92-U-235, and 92-U-238 have been calculated. Averaged cross-sections and other constants have been prepared in the WIMS 69-group format. Comparison has been made between group constants obtained with several evaluated libraries (KEDAK-3 1975, 1979, ENDF/B-4, ENDF/B-5) and the WIMS-D library. Observed differences are most pronounced in the resonance and fast region. From test runs on fue cell with the WIMS program it can be deduced that these differences affect the fewgroup constants significantly. (Atomindex citation 14:742759)