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岩本 修; 岩本 信之; 国枝 賢; 湊 太志; 中山 梓介; 安部 豊*; 椿原 康介*; 奥村 森*; 石塚 知香子*; 吉田 正*; et al.
Journal of Nuclear Science and Technology, 60(1), p.1 - 60, 2023/01
被引用回数：64 パーセンタイル：99.99(Nuclear Science & Technology)The fifth version of Japanese Evaluated Nuclear Data Library, JENDL-5, was developed. JENDL-5 aimed to meet a variety of needs not only from nuclear reactors but also from other applications such as accelerators. Most of the JENDL special purpose files published so far were integrated into JENDL-5 with revisions. JENDL-5 consists of 11 sublibraries: (1) Neutron, (2) Thermal scattering law, (3) Fission product yield, (4) Decay data, (5) Proton, (6) Deuteron, (7) Alpha-particle, (8) Photonuclear, (9) Photo-atomic, (10) Electro-atomic, and (11) Atomic relaxation. The neutron reaction data for a large number of nuclei in JENDL-4.0 were updated ranging from light to heavy ones, including major and minor actinides which affect nuclear reactor calculations. In addition, the number of nuclei of neutron reaction data stored in JENDL-5 was largely increased; the neutron data covered not only all of naturally existing nuclei but also their neighbor ones with half-lives longer than 1 day. JENDL-5 included the originally evaluated data of thermal scattering law and fission product yield for the first time. Light charged-particle and photon induced reaction data were also included for the first time as the JENDL general purpose file.
椿原 康介*; 奥村 森*; 石塚 知香子*; 吉田 正*; 湊 太志; 千葉 敏*
Journal of Nuclear Science and Technology, 58(2), p.151 - 165, 2021/02
被引用回数：10 パーセンタイル：71.58(Nuclear Science & Technology)The independent and cumulative fission product yields (FPYs) and their covariance matrices were newly evaluated for thermal- and fast-neutron induced fission and spontaneous fission. We principally evaluated the independent isobaric charge distributions by taking account of available experimental data, especially putting emphasis on the shell and even-odd staggering in the fission yields by applying a Boltzmann factor including the shell and the pairing correction energies for the mass of fission products. Furthermore, the isomeric ratios of FPY were obtained by a systematic calculation based on the Hauser-Feshbach theory. Normalization of the FPY and associated covariance matrices of independent FPY were determined based on the generalised least-square method to make them consistent with important physical constraints. Especially, the FPYs were normalized to be consistent with the mass chain yield of England and Rider. The cumulative FPYs were calculated by following the relevant 
-decay chain by using the decay data from JENDL/DDF-2015. Finally, we verified the FPYs evaluated presently by considering experimental decay heats, delayed neutron yields, aggregate antineutrino spectra and results from post-irradiation examination. All the results have shown that the present set of FPYs were consistent with these data, and free from trivial problems present in JENDL/FPY-2011.
千葉 敏*; 石塚 知香子*; 椿原 康介*; 岩本 修
JAEA-Conf 2019-001, 203 Pages, 2019/11
JAEA-Conf-2019-001.pdf:18.86MB
2018年度核データ研究会は、2018年11月29日
30日に、東京都目黒区東京工業大学大岡山キャンパス東京工業大学デジタル多目的ホールおよびコラボレーションルームにて開催された。本研究会は、日本原子力学会核データ部会が主催、日本原子力学会核データ部会、日本原子力学会「シグマ」特別専門委員会、日本原子力研究開発機構原子力基礎工学研究センター、東京工業大学科学技術創成研究院先導原子力研究所が共催した。今回、チュートリアルとして「核データ処理システムFRENDY」を、特別講演として「原子力発電のこれから」を実施した。また講演・議論のセッションとして「核データ研究の現状と展望」、「炉物理研究の現状と展望」、「話題」、「核データ応用分野」、「国際セッション」、「核データ測定及び原子炉診断の新技術」、「新分野からのデータニーズ」の7件を企画し実施した。さらに、ポスターセッションでは、実験、評価、ベンチマーク、応用など、幅広い研究内容について発表が行われた。参加者総数は82名で、それぞれの口頭発表及びポスター発表では活発な質疑応答が行われた。本報告集は、本研究会における口頭発表13件、ポスター発表22件の論文をまとめている。
