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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
Otsuka, Satoshi; Tanno, Takashi; Yano, Yasuhide; Fujita, Koji; Shizukawa, Yuta; Hashidate, Ryuta; Onizawa, Takashi; Kaito, Takeji; Ito, Chikara
no journal, ,
Implementation of fusion energy system and fast reactor cycle system requires the development of advanced materials resistant to the severe core environment where high-temperature and high-dose neutron irradiation are superposed. A lot of efforts have been made worldwide for research and development of oxide dispersion strengthened (ODS) steels with a variety of specification; Japan Atomic Energy Agency (JAEA) has focused on the development of 9Cr,11Cr-ODS tempered martensitic steel (TMS) for high-burnup fuel cladding tube of sodium-cooled fast reactor (SFR). This paper overviews the current status on 9Cr,11Cr-ODS TMS cladding tube development in JAEA, and discusses the cross-cutting issues in material development for advanced nuclear power systems.
Suzudo, Tomoaki; Toyama, Takeshi*; Hatano, Yuji*; Wang, J.*
no journal, ,
We conducted first-principles investigations of stability and mobility of various solute atoms in W crystals, and discovered that displaced W atoms having one-dimensional motion bind with some specified solute atoms and form mixed dumbbells. We also discovered easy three-dimensional migration paths of the mixed dumbbells. This study was followed by kinetic Monte Carlo modeling, which suggested that the mixed dumbbells can suppress radiation-induced vacancies, agreeing with experimental evidence. In the presentation, we also explain recent updates of first-principles investigation and experiments for various W binary alloys.
