This paper discusses the use of electron backscattered diffraction to characterize restructuring in a set of UO2 samples, irradiated in a pressurized water reactor at a burn-up between 35 and 73 GWd/tU, including standard UO2 samples and Cr-doped UO2 samples, to provide a better understanding of restructuring occurring both on the periphery and in the center of high-burn-up pellets. The formation of a high burn-up structure on the periphery of high burn-up UO2 was confirmed in our experiment. We found restructuring associated with bubble formation of all the samples in the central area, with higher irradiation temperatures when the burn-up exceeded 61 GWd/tU, regardless of their initial microstructure. This restructuring tended to progress with the increasing burn-up and to sub-divide the initial grains into sub-grains, with orientations close to that of the parent grains. Radial changes and differences between these samples showed that the burn-up and the temperature were not the only relevant parameters involved in restructuring.
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21 November 2022
Research Article|
November 21 2022
Restructuring in high burn-up UO2 fuels: Experimental characterization by electron backscattered diffraction Available to Purchase
Special Collection:
Radiation Effects in Materials
Isabelle Zacharie-Aubrun
;
Isabelle Zacharie-Aubrun
a)
(Investigation, Methodology, Writing – original draft)
1
CEA, DES, IRESNE, DEC, Cadarache
, F-13108 Saint-Paul-Lez-Durance, France
a)Author to whom correspondence should be addressed: [email protected]
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Rebecca Dowek
;
Rebecca Dowek
(Investigation, Methodology, Writing – review & editing)
1
CEA, DES, IRESNE, DEC, Cadarache
, F-13108 Saint-Paul-Lez-Durance, France
2
Institut Matériaux Microélectronique Nanosciences de Provence-IM2NP, Aix-Marseille University, UMR CNRS 7334
, Campus Saint Jérôme, France
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Jean Noirot
;
Jean Noirot
(Investigation, Methodology, Writing – review & editing)
1
CEA, DES, IRESNE, DEC, Cadarache
, F-13108 Saint-Paul-Lez-Durance, France
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Thierry Blay;
Thierry Blay
(Investigation)
1
CEA, DES, IRESNE, DEC, Cadarache
, F-13108 Saint-Paul-Lez-Durance, France
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Martiane Cabié
;
Martiane Cabié
(Supervision, Writing – review & editing)
3
CNRS, FSCM, CP2M, Aix Marseille University
, Campus Saint Jérôme, France
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Myriam Dumont
Myriam Dumont
(Supervision, Writing – review & editing)
4
Arts et Métiers Institute of Technology, MSMP, HESAM Université
, F-59000 Lille, France
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Isabelle Zacharie-Aubrun
1,a)
Rebecca Dowek
1,2
Jean Noirot
1
Thierry Blay
1
Martiane Cabié
3
Myriam Dumont
4
1
CEA, DES, IRESNE, DEC, Cadarache
, F-13108 Saint-Paul-Lez-Durance, France
2
Institut Matériaux Microélectronique Nanosciences de Provence-IM2NP, Aix-Marseille University, UMR CNRS 7334
, Campus Saint Jérôme, France
3
CNRS, FSCM, CP2M, Aix Marseille University
, Campus Saint Jérôme, France
4
Arts et Métiers Institute of Technology, MSMP, HESAM Université
, F-59000 Lille, France
a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the Special Topic on Radiation Effects in Materials.
J. Appl. Phys. 132, 195903 (2022)
Article history
Received:
June 21 2022
Accepted:
October 23 2022
Citation
Isabelle Zacharie-Aubrun, Rebecca Dowek, Jean Noirot, Thierry Blay, Martiane Cabié, Myriam Dumont; Restructuring in high burn-up UO2 fuels: Experimental characterization by electron backscattered diffraction. J. Appl. Phys. 21 November 2022; 132 (19): 195903. https://doi.org/10.1063/5.0104865
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