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Otaka, Toshiki*; Sato, Tatsumi*; Ono, Shimpei; Nagoshi, Kohei; Abe, Ryoji*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki; Nakatani, Kiyoharu*
Analytical Sciences, 35(10), p.1129 - 1133, 2019/10
Times Cited Count：9 Percentile：40.49(Chemistry, Analytical)Sato, Isamu; Arima, Tatsumi*; Nishina, Masahiro*; Tanaka, Kosuke; Onose, Shoji; Idemitsu, Kazuya*
JAEA-Research 2012-006, 66 Pages, 2012/05
JAEA-Research-2012-006.pdf:13.55MB
As one of the important properties for fuel manufacturability and burning behavior, the diffusion behavior of actinides in oxide fuels was investigated by both the experimental and the molecular dynamics simulation (MD). Using diffusion couples consisted of an Am containing mixed oxide fuel and a UO
fuel, the diffusion tests were performed. The diffusion coefficients were estimated to be 10
m
/s 
10
m/s. In addition, the difference between Pu and Am diffusion coefficients was vanishingly small. The temperature dependence of bulk diffusion coefficients of actinides in mixed oxide fuels could be evaluated by MD. An evaluation technique for the grain boundary diffusion could be established based on the coincidence site lattice theory. The practical diffusion coefficients were obtained by combining data from the experiments with those predicted from MD. The practical diffusion coefficients obtained was discussed for use of a fuel behavior analysis code.
Sato, Isamu; Tanaka, Kosuke; Arima, Tatsumi*
IOP Conference Series; Materials Science and Engineering, 9, p.012005_1 - 012005_8, 2010/05
Times Cited Count：2 Percentile：70.97(Chemistry, Inorganic & Nuclear)UO discs and Am containing MOX discs were prepared to be diffusion couples. They were annealed for 4.5 h at 1600
C in a furnace under the constant oxygen partial pressures, and then concentrations of Pu and Am across the interfaces of them were measured with EPMA. The average diffusion coefficients of Pu and Am were obtained from the concentration profiles and were between 10
and 10
m/s, in which the difference between Pu and Am was undetermined. This indicates that the difference between redistributions of Pu and Am found in a PIE may not be caused by the diffusion but by the other transport phenomenon. Moreover, the diffusion behavior was affected by existence of grain boundaries and the oxygen partial pressure in the furnace during annealing. From the affection of the grain boundary to the diffusion, the "practical" diffusion estimation may need grain boundary modeling.
Sato, Isamu*; Arima, Tatsumi*; Idemitsu, Kazuya*; ; Namekawa, Takashi
JNC TY9400 99-003, 153 Pages, 1999/02
no abstracts in English
Sato, Isamu*; *; ; Arima, Tatsumi*;
PNC TY9606 98-003, 99 Pages, 1998/06
no abstracts in English
Sato, Isamu*; *; ; Arima, Tatsumi*; ; Kajitani, Yukio
PNC TY9606 97-001, 117 Pages, 1997/07
no abstracts in English
Sato, Isamu; Tanaka, Kosuke; Tanaka, Kenya; Arima, Tatsumi*; Idemitsu, Kazuya*
no journal, ,
Both an Am containing MOX fuel and a UO fuel were contacted and heated, and then the diffusion behavior was observed by EPMA. The diffusion coefficients of Pu and Am as an important property for fuel design were evaluated from these result.
Sato, Isamu; Tanaka, Kosuke; Tanaka, Kenya; Arima, Tatsumi*; Idemitsu, Kazuya*
no journal, ,
Diffusion couples with polycrystalline UO and Am-MOX discs were annealed for 4.5 h at 1600C under constant oxygen partial pressures. Concentrations of Pu and Am across the interfaces of the couples were measured using EPMA. The average diffusion coefficients of Pu and Am were estimated to be 10 and 10m/s by fitting their concentration profiles to Fick's law, and the difference between them was not so significant.
Takeda, Masayasu; Yamazaki, Dai; Hayashida, Hirotoshi; Kubota, Masato; Maruyama, Ryuji; Soyama, Kazuhiko; Asaoka, Hidehito; Yamazaki, Tatsuya; Yoshida, Noboru*; Sakaguchi, Yoshifumi*; et al.
no journal, ,
no abstracts in English
Takeda, Masayasu; Yamazaki, Dai; Hayashida, Hirotoshi; Kubota, Masato; Maruyama, Ryuji; Soyama, Kazuhiko; Asaoka, Hidehito; Yamazaki, Tatsuya*; Yoshida, Noboru*; Sakaguchi, Yoshifumi*; et al.
no journal, ,
no abstracts in English
Kubota, Masato; Takeda, Masayasu; Yamazaki, Dai; Soyama, Kazuhiko; Maruyama, Ryuji; Hayashida, Hirotoshi; Asaoka, Hidehito; Oikawa, Kenichi; Yamazaki, Tatsuya*; Aizawa, Kazuya; et al.
no journal, ,
Takeda, Masayasu; Yamazaki, Dai; Soyama, Kazuhiko; Hayashida, Hirotoshi; To, Kentaro; Yamagishi, Hideshi*; Katagiri, Masaki*; Sakasai, Kaoru; Maruyama, Ryuji; Mizusawa, Tazuko*; et al.
no journal, ,
Takeda, Masayasu; Yamazaki, Dai; Soyama, Kazuhiko; Hayashida, Hirotoshi; To, Kentaro; Yamagishi, Hideshi*; Katagiri, Masaki*; Sakasai, Kaoru; Maruyama, Ryuji; Mizusawa, Tazuko*; et al.
no journal, ,
with molecular dynamics methodSato, Isamu; Matsumoto, Taku; Koyama, Shinichi; Arima, Tatsumi*
no journal, ,
Diffusion coefficients of fission product elements, Zr, Nd, Ba and Sr in UO crystal which are substituent cations for U were evaluated with molecular dynamics. The diffusion coefficients of Nd and Ba/Sr which are trivalent and divalent cations are greater than those of U and Zr that are tetravalent cations.
Otaka, Toshiki*; Sato, Tatsumi*; Nakatani, Kiyoharu*; Nagoshi, Kohei*; Abe, Ryoji*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki
no journal, ,
no abstracts in English
Hasemi, Hiroyuki; Tatsumi, Kazuyoshi; Sato, Hirotaka*; Kamiyama, Takashi*
no journal, ,
no abstracts in English
Lan, Z.*; Yogo, Akifumi*; Hayakawa, Takehito*; Wei, T.*; Kamiyama, Takashi*; Sato, Hirotaka*; Arikawa, Yasunobu*; Mirfayzi, R.*; Koizumi, Mitsuo; Abe, Yuki*; et al.
no journal, ,
Lan, Z.*; Wei, T.*; Hayakawa, Takehito*; Kamiyama, Takashi*; Sato, Hirotaka*; Arikawa, Yasunobu*; Mirfayzi, S. R.*; Koizumi, Mitsuo; Abe, Yuki*; Morace, A.*; et al.
no journal, ,
Lan, Z.*; Hayakawa, Takehito*; Wei, T.*; Kamiyama, Takashi*; Sato, Hirotaka*; Arikawa, Yasunobu*; Mirfayzi, S. R.*; Koizumi, Mitsuo; Abe, Yuki*; Mori, Takato*; et al.
no journal, ,
Hasemi, Hiroyuki; Tatsumi, Kazuyoshi; Sato, Hirotaka*; Kamiyama, Takashi*
no journal, ,
no abstracts in English
Yogo, Akifumi*; Lan, Z.*; Arikawa, Yasunobu*; Hayakawa, Takehito*; Mirfayzi, S. R.*; Wei, T.*; Tatsumi, Yuta*; Sato, Hirotaka*; Kamiyama, Takashi*; Koizumi, Mitsuo
no journal, ,
no abstracts in English
