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Oxygen self-diffusion in near stoichiometric (U,Pu)O$$_{2}$$ at high temperatures of 1673-1873 K

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

The oxygen self-diffusion coefficients in near stoichiometric (U,Pu)O$$_{2}$$ at high temperatures were successfully measured by thermogravimetry combined with the oxygen isotope exchange method. The activation energy for oxygen diffusion in the stoichiometric composition of (U,Pu)O$$_{2}$$ was evaluated from experimental data, and the value was determined to be 248 kJ/mol. In addition, the defect migration energies of (U,Pu)O$$_{2 pm x}$$ were derived, and the oxygen self-diffusion coefficients were evaluated using these. As a result, good agreement was found between the experimental data and the oxygen self-diffusion coefficients calculated using the defect migration energies.

Language

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English

Journal

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Journal of Nuclear Materials

Volume

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542

Number

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Pages

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p.152472_1 - 152472_7

Publication Year/Month

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2020/12

Meeting title

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Held date

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Location (city)

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1016/j.jnucmat.2020.152472

DOI for research data

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Keywords

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no keyword

Research Facility

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プルトニウム燃料製造施設

Press Release

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Article of JAEA R&D Review

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Capturing the Oxygen Diffusion Phenomena in Nuclear Fuel; Measurement and Evaluation of the Oxygen Self-Diffusion Coefficient of MOX Fuel[/]

Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:24.28

Category:Materials Science, Multidisciplinary

Altmetrics

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