Title: Structural investigation of self-irradiation damaged AmO2
Authors: PRIEUR DAMIENVIGIER JEAN-FRANCOISWISS ThierryJANSSEN ArneROTHE J.CAMBRIANI ANDREASOMERS Joseph
Citation: JOURNAL OF SOLID STATE CHEMISTRY vol. 212 p. 7-12
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Publication Year: 2014
JRC N°: JRC84865
ISSN: 0022-4596
URI: http://www.sciencedirect.com/science/article/pii/S0022459613006038
http://publications.jrc.ec.europa.eu/repository/handle/JRC84865
DOI: 10.1016/j.jssc.2013.12.016
Type: Articles in periodicals and books
Abstract: Studying self-irradiated materials is an ideal means to investigate the effect of the damages on material structure and to better understand the behaviour of irradiated nuclear fuels. In this context, X-ray diffraction, X-ray absorption spectroscopy and transmission electron microscopy have been used to investigate self-irradiation damaged AmO2. Combining these techniques allows studying the microstructure and the variation of the fluorite structure at both short-range and long-range order. Thus, the increase of both interatomic distances and lattice parameter was shown, as well as the presence of nanometer sized He bubbles. As confirmed by the observed high-level of crytallinity, the fluorite structure exhibits a high radiation tolerance, which is confirmed by the low increase of the lattice parameter. This could be explained by a self-annealing mechanism of the created defects at room temperature.
JRC Directorate:Nuclear Safety and Security

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