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Uranium-plutonium-americium cation interdiffusion in polycrystalline (U,Pu,Am)O$$_{2 pm x}$$ mixed oxides

多結晶(U,Pu,Am)O$$_{2 pm x}$$混合酸化物におけるウラン、プルトニウム、アメリシウムカチオンの相互拡散

Vauchy, R.  ; 松本 卓; 廣岡 瞬 ; 宇野 弘樹*; 田村 哲也*; 有馬 立身*; 稲垣 八穂広*; 出光 一哉*; 中村 博樹  ; 町田 昌彦  ; 村上 龍敏 ; 加藤 正人   

Vauchy, R.; Matsumoto, Taku; Hirooka, Shun; Uno, Hiroki*; Tamura, Tetsuya*; Arima, Tatsumi*; Inagaki, Yaohiro*; Idemitsu, Kazuya*; Nakamura, Hiroki; Machida, Masahiko; Murakami, Tatsutoshi; Kato, Masato

Diffusion couples made of dense polycrystalline (U,Pu,Am)O$$_{2 pm x}$$ oxides were annealed in various thermodynamic conditions (temperature, oxygen partial pressure), and for different durations. The associated actinide redistribution was quantified using Electron Probe Micro-Analysis (EPMA). Average diffusion profiles were obtained from elemental U, Pu, and Am X-ray maps and the resulting interdiffusion coefficients were calculated, then analyzed at the light of our model of point defect chemistry.

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