Conditions Extrêmes et Matériaux : Haute Température et Irradiation

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M.Gérardin, E.Gilabert, D.Horlait, M-F.Barthe, G.Carlot, 'Diffusion of Xe and Kr implanted at low concentrations in UO2 as a function of temperature – An experimental study', J. Nucl. Mater. 582 154476 (2023) doi:10.1016/j.jnucmat.2023.154476

Fission gases production and release have a large impact on uranium dioxide fuel performance. To predict fuel properties in pile, a better understanding of the fission gas behaviour in uranium dioxide is needed. UO2 samples were implanted with Xe or Kr at low doses to avoid trapping by irradiation defects and/or gas clusters. The release rates of Xe and Kr were studied at temperatures ranging up to 1400°C. Results show an excellent agreement with the substantial literature on xenon diffusion in irradiated UO2.