Japanese evaluated nuclear data library version 3 revision-3; JENDL-3.3

Shibata, Keiichi; Kawano, Toshihiko*; Nakagawa, Tsuneo; Iwamoto, Osamu  ; Katakura, Junichi; Fukahori, Tokio  ; Chiba, Satoshi; Hasegawa, Akira; Murata, Toru*; Matsunobu, Hiroyuki*; Osawa, Takaaki*; Nakajima, Yutaka*; Yoshida, Tadashi*; Zukeran, Atsushi*; Kawai, Masayoshi*; Baba, Mamoru*; Ishikawa, Makoto*; Asami, Tetsuo*; Watanabe, Takashi*; Watanabe, Yukinobu*; Igashira, Masayuki*; Yamamuro, Nobuhiro*; Kitazawa, Hideo*; Yamano, Naoki*; Takano, Hideki

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; 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.