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Kwon, H.*; Shiga, Motoyuki; Kimizuka, Hajime*; Oda, Takuji*
Acta Materialia, 247, p.118739_1 - 118739_11, 2023/04
Times Cited Count：5 Percentile：81.19(Materials Science, Multidisciplinary)We estimate the diffusivity of dilute hydrogen in body-centered-cubic metals, Nb, Fe, and W, from path integral simulations using machine-learning moment tensor potentials with an accuracy level of density functional theory. Our computational results show great agreement with some experimental results that appear to be accurate. The isotope effects are also reproduced consistently with the experimental data.
Kuno, Yusuke; Tazaki, Makiko; Akiba, Mitsunori*; Adachi, Takeo*; Takashima, Ryuta*; Omoto, Akira*; Oda, Takuji*; Choi, J.-S.*; Tanaka, Satoru*
Proceedings of INMM 53rd Annual Meeting (CD-ROM), 10 Pages, 2012/07
This paper will present brief historical review of multilateral nuclear approach (MNA), and based on which, a basic concept of a reliable framework of nuclear fuel cycle, where the fuel-cycle services could be provided without discrimination and meet the international 3S requirements, is discussed.
Kuno, Yusuke; Oda, Takuji*; Tanaka, Satoru*; Fukasawa, Tetsuo*; Tanabe, Tomoyuki*; Tamai, Hiroshi; Horio, Kenta*; Hamasaki, Manabu*; Shinohara, Nobuo*; Ikeda, Yuta*
Proceedings of INMM 52nd Annual Meeting (CD-ROM), 10 Pages, 2011/07
The substance and implication of PR from the viewpoints of risk evaluation on nuclear proliferation was studied in this paper. As an example, ten next-generation reprocessing technology candidates were evaluated with GIF PR and PP methodology to find degree of relative difference in PR from the presently available technology - PUREX. PR effectiveness in proliferation risk was also assessed and it was found that the effectiveness of PR measures is subject to the status of each nation.
TiO
under varied surface conditionOlivares, R.*; Oda, Takuji*; Oya, Yasuhisa*; Tanaka, Satoru*; Tsuchiya, Kunihiko
Fusion Engineering and Design, 75-79, p.765 - 768, 2005/11
Times Cited Count：9 Percentile：53.1(Nuclear Science & Technology)no abstracts in English
TiORyan, O.*; Oda, Takuji*; Oya, Yasuhisa*; Tanaka, Satoru*; Tsuchiya, Kunihiko
JAERI-Conf 2004-012, p.136 - 139, 2004/07
no abstracts in English
Tanaka, Satoru*; Nagasaki, Shinya*; Nakata, Kotaro*; Oda, Takuji*; Kameda, Jun*; Kamei, Gento; Tachi, Yukio
JNC TY8400 2003-008, 88 Pages, 2003/05
JNC-TY8400-2003-008.pdf:1.29MB
Redox reactions between Cr(VI) and iron(II) chloride (FeCl2) and those between Cr(VI) and magnetite (Fe(II)1Fe(III)2O4) were observed as a preliminary study. According to the experimental results, it was suggested that the redox reactions were promoted more than the amount of Fe(II) on magnetite surface because of electron transfer from internal Fe(II) to magnetite surface. The results were quantitatively supported from quantum chemical calculations. Redox reactions between Np(V) and magnetite and the reduction of Np to tetravalent were observed, while those between Np(V) and FeCl2 were not observed obviously. It was observed that the reactions were promoted rapidly when the magnetite / solution ratio and the temperature were high, and the rate constant of the reactions was obtained. Furthermore, it was found that hydrogen gas and hydrogen ion were generated with crushing the quartz in an inert gas atmosphere.
