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-ironHirayama, Shintaro*; Sato, Koichi*; Kato, Daiji*; Iwakiri, Hirotomo*; Yamaguchi, Masatake; Watanabe, Yoshiyuki*; Nozawa, Takashi*
Nuclear Materials and Energy (Internet), 31, p.101179_1 - 101179_9, 2022/06
Times Cited Count：4 Percentile：66.21(Nuclear Science & Technology)no abstracts in English
Ishizawa, Akihiro*; Idomura, Yasuhiro; Imadera, Kenji*; Kasuya, Naohiro*; Kanno, Ryutaro*; Satake, Shinsuke*; Tatsuno, Tomoya*; Nakata, Motoki*; Nunami, Masanori*; Maeyama, Shinya*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 92(3), p.157 - 210, 2016/03
The high-performance computer system Helios which is located at The Computational Simulation Centre (CSC) in The International Fusion Energy Research Centre (IFERC) started its operation in January 2012 under the Broader Approach (BA) agreement between Japan and the EU. The Helios system has been used for magnetised fusion related simulation studies in the EU and Japan and has kept high average usage rate. As a result, the Helios system has contributed to many research products in a wide range of research areas from core plasma physics to reactor material and reactor engineering. This project review gives a short catalogue of domestic simulation research projects. First, we outline the IFERC-CSC project. After that, shown are objectives of the research projects, numerical schemes used in simulation codes, obtained results and necessary computations in future.
Watanabe, Yoshiyuki; Iwakiri, Hirotomo*; Murayoshi, Norihiko*; Kato, Daiji*; Tanigawa, Hiroyasu
Plasma and Fusion Research (Internet), 10, p.1205086_1 - 1205086_2, 2015/12
In this paper, formation energy of isolated hydrogen atom in Cr
C
has been theoretically investigated with atomistic calculation based on the density functional theory. The lowest calculated formation energy of a hydrogen atom is -0.48 eV with a trigonal bipyramidal configuration surrounded by five regular Cr lattice atoms. A comparison of the formation energy of hydrogen atom in bcc-iron may indicate that hydrogen atoms in F82H steel are more energetically favorable in CrC-based precipitate rather than Fe-based matrix, leading to an increase of the tritium retention in the precipitate.
Watanabe, Yoshiyuki; Morishita, Kazunori*; Hamaguchi, Dai; Tanigawa, Hiroyasu
no journal, ,
In order to realize a reliable fusion reactor, it is required to develop a methodology to predict material's response to fusion irradiation by theoretically-appropriate extrapolation of the irradiation data obtained from alternative facilities such as existing material testing reactors and ion accelerators, in which a computational simulation modeling approach from the multiscale viewpoint is important. In this report, it is summarized to mechanistically model microstructural change, formation of defect clusters, in metals and ceramics during irradiation, as part of BA-DEMO R&D activities.
Watanabe, Yoshiyuki; Morishita, Kazunori*; Hamaguchi, Dai; Tanigawa, Hiroyasu
no journal, ,
no abstracts in English
Tanigawa, Hiroyasu; Ando, Masami; Sakasegawa, Hideo; Watanabe, Yoshiyuki; Kano, Sho*; Hashimoto, Naoyuki*; Abe, Hiroaki*
no journal, ,
Precipitates are the key microstructures for the mechanical properties of reduced activation ferritic/martensitic (RAFM) steels, and the stability of those precipitates is essential to use RAFM for high temperature and high dose application. In this study, precipitation behavior of TaC and its stability under irradiation were studied to understand basic mechanism of those MX precipitation behaviors under irradiation.
Watanabe, Yoshiyuki; Iwakiri, Hirotomo*; Murayoshi, Norihiko*; Kato, Daiji*; Tanigawa, Hiroyasu
no journal, ,
no abstracts in English
Watanabe, Yoshiyuki; Morishita, Kazunori*; Nakasuji, Toshiki*; Hamaguchi, Dai; Ando, Masami*; Tanigawa, Hiroyasu
no journal, ,
no abstracts in English
Tanigawa, Hiroyasu*; Nakajima, Motoki*; Sakasegawa, Hideo; Ando, Masami*; Watanabe, Yoshiyuki*; Nozawa, Takashi*; Kato, Yutai*; Nakata, Toshiya*
no journal, ,
