Experimental study of the diffusion of Xe and Kr implanted at low concentrations in UO2 and determination of their trapping mechanisms
| Autor: | E. Gilabert, M. Gerardin, Denis Horlait, G. Carlot, Marie-France Barthe |
|---|---|
| Přispěvatelé: | GeoRessources, Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Institut national des sciences de l'Univers (INSU - CNRS), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Euratom research and training program 2014‐2018 under Grant Agreement No 754329, INSPYRE project, Institut national des sciences de l'Univers (INSU - CNRS)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Uranium dioxide Analytical chemistry chemistry.chemical_element 02 engineering and technology 01 natural sciences 7. Clean energy Ion chemistry.chemical_compound Xenon 0103 physical sciences General Materials Science Irradiation Diffusion (business) 010306 general physics Nuclear fuel Krypton [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Ion implantation Nuclear Energy and Engineering chemistry 13. Climate action 0210 nano-technology [CHIM.RADIO]Chemical Sciences/Radiochemistry |
| Zdroj: | Journal of Nuclear Materials Journal of Nuclear Materials, Elsevier, 2021, 556, pp.153174. ⟨10.1016/j.jnucmat.2021.153174⟩ Journal of Nuclear Materials, 2021, 556, pp.153174. ⟨10.1016/j.jnucmat.2021.153174⟩ |
| ISSN: | 0022-3115 |
| Popis: | International audience; The fission of uranium dioxide produces gaseous elements degrading nuclear fuel properties. A thorough understanding of the transport and release of gaseous products is thus essential. The present work focuses on xenon and krypton migration mechanism in uranium dioxide. Desorption experiments on ion implanted UO2 were performed at 1300°C. Xe and Kr releases were simulated using a mesoscale model that was developed taking into account single gas atom diffusion and defect traps. We showed that the defects have a high influence on Xe and Kr migration mechanisms and therefore have to be considered to accurately determine diffusion coefficients. We evaluated the diffusion coefficient of Xe and Kr at (1.73 ± 0.15)x10−20 m2/s at 1300°C and we showed that the diffusion of rare gases is subjected to two trapping mechanisms. The first occurs during the ion implantation and the second during high-temperature annealings. The nature of the trapping sites is discussed in the light of the literature on radiation induced defects. This study also consolidates the use of non activated UO2 implanted with heavy ions as a less-hazardeous substitute for irradiated UO2. |
| Databáze: | OpenAIRE |
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