期刊
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
卷 39, 期 11, 页码 1125-1136出版社
ATOMIC ENERGY SOC JAPAN
DOI: 10.3327/jnst.39.1125
关键词
JENDL-3.3; nuclear data; evaluation; reliability; resonance; cross section; spectrum; covariance; benchmark; criticality; shielding
Evaluation for JENDL-3.3 has been performed by considering the accumulated feedback information and various benchmark tests of the previous library JENDL-3.2. The major problems of the JENDL-3.2 data were solved by the new library: overestimation of criticality values for thermal fission reactors was improved by the modifications of fission cross sections and fission neutron spectra for U-235; incorrect energy distributions of secondary neutrons from important heavy nuclides were replaced with statistical model calculations; the inconsistency between elemental and isotopic evaluations was removed for medium-heavy nuclides. Moreover, covariance data were provided for 20 nuclides. The reliability of JENDL-3.3 was investigated by the benchmark analyses on reactor and shielding performances. The results of the analyses indicate that JENDL-3.3 predicts various reactor and shielding characteristics better than JENDL-3.2.
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