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Oxygen self and chemical diffusion coefficients in (U, Pu)O$$_{2}$$

Watanabe, Masashi ; Kato, Masato  ; Sunaoshi, Takeo*

Diffusion phenomena of oxygen in mixed oxide fuel are especially important in understanding fuel behaviour. The reason is that sintering, evaporation, oxygen redistribution and behaviour of fission products are essentially involved in the oxygen diffusion process. Thus, the purpose of this work is to precisely measure the oxygen self and chemical diffusion coefficients in (U, Pu)O$$_{2}$$ at high temperatures and to evaluate the relationship between both coefficients.

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