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irradiation effects of image sensor for radiation-resistant cameraTakeuchi, Tomoaki; Otsuka, Noriaki; Kamiyanagi, Tomohiro*; Watanabe, Takashi*; Komanome, Hirohisa*; Ueno, Shunji*; Tsuchiya, Kunihiko
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Watanabe, So; Sano, Yuichi; Ishigami, Ryoya*
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Yoshida, Hiroyuki; Uesawa, Shinichiro; Yamashita, Susumu; Nagase, Fumihisa
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Aoyagi, Mitsuhiro; Ohno, Shuji; Uno, Masayoshi*
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We have been conducting an R&D project to develop detailed numerical simulation methods for sodium fire consequences which is one of risks to put heat and pressure loads to containment vessel of sodium-cooled fast reactor. We carried out assessment and modification of turbulence model in the sodium fire simulation code.
Matsuura, Haruaki*; Nezu, Atsushi*; Arai, Tsuyoshi*; Ono, Shimpei*; Sano, Yuichi; Watanabe, So
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Suzudo, Tomoaki; Hasegawa, Akira*
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Tungsten is expected to be a promising plasma-facing material for future fusion devices, but radiation-induced precipitation (RIP), which leads the material to hardening, is a concern at their practical use. One of the keys to accurate prediction of the emergence of RIP is migration of solute atoms, rhenium and osmium, that are produced by nuclear transmutation through irradiation. We conduct a series of numerical simulations using an atomic kinetic Monte Carlo method and investigate the migration of these solute atoms in the form of tungsten-rhenium and tungsten-osmium mixed dumbbells, considered to be the most efficient "carriers" of the solute atoms. We find that the low rotation energy barrier of these mixed dumbbells leading to three-dimensional migration greatly influences their diffusivities. The result also suggests that, although these dumbbells have three-dimensional motion, one cannot simply reduce their migration behavior to that of vacancy-like spherical objects.
Saito, Junichi; Nagai, Keiichi; Ara, Kuniaki
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Tachi, Yoshiaki; Takaki, Naoyuki*; Iida, Takumi*; Wakabayashi, Toshio*
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Ishida, Shinya; Kawada, Kenichi
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Hayashi, Hirokazu; Saito, Hiroaki; Kurata, Masaki
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Matsuura, Kota*; Monji, Hideaki*; Yamashita, Susumu; Yoshida, Hiroyuki
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Hirakawa, Yasushi; Furukawa, Tomohiro
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At the replacement of the components such as the target assembly of the International Fusion Irradiation Facility (IFMIF), cleaning of the adhered lithium on the inner surface of the components is required for the long term storage. In this study, we performed the dissolution experiment of lithium compounds in ethanol, and the dependency on temperature and time were clarified.
Sogabe, Joji; Wada, Yusaku; Suzuki, Toru; Tobita, Yoshiharu
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Oya, Naoki*; Okawa, Tomio*; Enoki, Koji*; Ohno, Shuji; Aoyagi, Mitsuhiro
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This study aimed at improvement of sodium fire analysis method for coolant leakage in sodium-cooled fast reactor. A semi-empirical method to estimate the splashing rate during liquid jet impact onto a horizontal wall was proposed based on consideration of splashing mechanism.
Tani, Akihiro*; Kan, Taro*; Okano, Yasushi
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Focal points on reactor core systems of the Safety Design Guidelines are presented based on next generation SFR designs, specifically on "Fuel", "Reactor core cooling ability", "Active shutdown system", "Reactor shutdown utilizing passive system or inherent feedbacks", "Recriticality-free and in-vessel retention approaches".
Horiguchi, Naoki; Yoshida, Hiroyuki; Nakao, Yasuhiro*; Kanagawa, Tetsuya*; Kaneko, Akiko*; Abe, Yutaka*
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Narushima, Yuki*; Abe, Yutaka*; Kaneko, Akiko*; Kanagawa, Tetsuya*; Suzuki, Takayuki*; Yoshida, Hiroyuki
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Nakao, Yasuhiro*; Horiguchi, Naoki; Yoshida, Hiroyuki; Kanagawa, Tetsuya*; Kaneko, Akiko*; Abe, Yutaka*
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Miyazaki, Akifumi*; Kato, Yuki*; Kanagawa, Tetsuya*; Kaneko, Akiko*; Monji, Hideaki*; Yoshida, Hiroyuki; Abe, Yutaka*
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Kimura, Yoshiki; Funatake, Yoshio; Shinohara, Nobuo
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no abstracts in English