Ciszak, Clément and Desgranges, Lionel and Garcia, Philippe and Sabathier, Catherine and Fayette, Laurent and Chevalier, Sébastien
On the origins and the evolution of the fuel-cladding bonding phenomenon in PWR fuel rods.
(2019)
Journal of Nuclear Materials, 520. 110-120. ISSN 0022-3115
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(Document in English)
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Official URL: https://doi.org/10.1016/j.jnucmat.2019.04.015
Abstract
This study proposes a new and detailed description of the fuel-cladding bonding phenomenon occurring in PWR fuel rods. Very early and late bonding states were characterized on specimens of 35.3 GWd.tU−1 moderate burnup and of 64.5 GWd.tU−1 high burnup respectively. Results were then compared with those achieved on a re-created bonded situation obtained on a Zircaloy-4/hyper-stoichiometric UO2+x model materials diffusion couple. These results tend to indicate that a chemical adhesion is probably at the origin of the PWR fuel-cladding bonding. In addition, the progressive formation of ZrO2/UO2 interfacial circumvolutions observed with increasing burnup, which lead to the physical anchorage of ZrO2 and UO2, is likely to lead to their mechanical adhesion. Thus, the in-reactor ZrO2/UO2 bonding could be considered, since the occurrence of the first bonded situations, as an adhesion phenomenon owning two components: an initial chemical progressively strengthened by a second mechanical.
Item Type: | Article |
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HAL Id: | hal-03198832 |
Audience (journal): | International peer-reviewed journal |
Uncontrolled Keywords: | |
Institution: | French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE) French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Other partners > Université de Bourgogne - UB (FRANCE) Other partners > Université de Technologie de Belfort-Montbéliard - UTBM (FRANCE) |
Laboratory name: | |
Funders: | Electricité de France - EDF (France) - Framatome (France) |
Statistics: | download |
Deposited On: | 15 Apr 2021 08:52 |
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