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Toh, Yosuke
JAEA-Conf 2019-001, p.47 - 52, 2019/11
no abstracts in English
Tada, Kenichi
JAEA-Conf 2019-001, p.29 - 34, 2019/11
JAEA has developed a new nuclear data processing code FRENDY (FRom Evaluated Nuclear Data librarY to any application) to generate a cross-section data library from evaluated nuclear data library JENDL. In this presentation, author explains how to generate cross-section data library and overview and features of FRENDY.
Konno, Chikara; Kwon, Saerom*
JAEA-Conf 2019-001, p.167 - 172, 2019/11
TENDL (TALYS-based Evaluated Nuclear Data Library) has been used as a standard nuclear data library worldwide, particularly in Europe. Since 2016 we also have used the official ACE files of TENDL-2015 for our study, where we found two problems. (1) There are no probability table data in the neutron sub-library ACE files of most of the nuclei with unresolved resonance data. Calculated results are not correct in the case that the self-shielding effect in the unresolved resonance region is large. (2) There are no secondary gamma data in a lot of the ACE files not only of the neutron sub-library but also of the proton, deuteron, triton, and helium sub-libraries. This is due to an inadequate NJOY input. MCNP reads particle production data in the official ACE files as gamma production data incorrectly and produces wrong secondary gammas. It is noted that the official ACE files in the latest TENDL-2017 still have these problems except for those of main nuclei, which have been revised based on our study.
Katabuchi, Tatsuya*; Iwamoto, Osamu; Hori, Junichi*; Iwamoto, Nobuyuki; Kimura, Atsushi; Nakamura, Shoji; Shibahara, Yuji*; Terada, Kazushi*
JAEA-Conf 2019-001, p.193 - 197, 2019/11
rays in 
U(n
,f)Ogawa, Tatsuhiko; Makii, Hiroyuki; Nishio, Katsuhisa; Hirose, Kentaro; Orlandi, R.; L
guillon, R.*; Soldner, T.*; Hambsch, F.-J.*; A
che, M.*; Astier, A.*; et al.
no journal, ,
Measurement of -rays emitted from fission of actinide has been conducted for radiation transport analysis in reactors, safety of spent fuel, and fundamental nuclear physics. In earlier studies, -rays up to 8 MeV were measured because they are those emitted by fission fragments at excited states. According to some theoretical studies, however, some fission fragments have excitation energy up to 20 MeV and they emit -rays above 8 MeV. In this study, the -rays produced by fission of U induced by thermal neutrons were measured with LaBr scintillators at the high-flux reactor in the Institut Laue Langevin. The obtained -ray spectrum agreed with the earlier measurement below 8 MeV, forms a bump above 10 MeV, and smoothly continued up to 20 MeV. The measurement in this study clarified the -ray energy spectrum attributed to fission reactions up to 20 MeV in case of U(n,f).
