TITLE

Comparisons of Neutron Cross Sections and Isotopic Composition Calculations for Fission-Product Evaluations

AUTHOR(S)
Do Heon Kim; Choong-Sup Gil; Jonghwa Chang; Yong-Deok Lee
PUB. DATE
May 2005
SOURCE
AIP Conference Proceedings;2005, Vol. 769 Issue 1, p511
SOURCE TYPE
Conference Proceeding
DOC. TYPE
Article
ABSTRACT
The neutron absorption cross sections for 18 fission products evaluated within the framework of the KAERI (Korea Atomic Energy Research Institute)-BNL (Brookhaven National Laboratory) international collaboration have been compared with ENDF/B-VI.7. Also, the influence of the new evaluations on the isotopic composition calculations of the fission products has been estimated through the OECD/NEA burnup credit criticality benchmarks (Phase 1B) and the LWR/Pu recycling benchmarks. These calculations were performed by WIMSD-5B with the 69-group libraries prepared from three evaluated nuclear data libraries: ENDF/B-VI.7, ENDF/B-VI.8 including the new evaluations in the resonance region covering the thermal region, and the expected ENDF/B-VII including those in the upper resonance region up to 20 MeV. For Xe-131, the composition calculated with ENDF/B-VI.8 shows a maximum difference of 5.02% compared to ENDF/B-VI.7. However, the isotopic compositions of all the fission products calculated with the expected ENDF/B-VII show no differences when compared to ENDF/B-VI.7 for the thermal reactor benchmark cases. © 2005 American Institute of Physics
ACCESSION #
17307309

 

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