Comparative study of the I-UO2 and Cs-UO2 systems under conditions representative of irradiated fuel
Year: 2025
Type: article
Abstract: A comparative study of the behaviour of Iodine and Caesium in uranium oxide was conducted. UO 2 samples implanted with Iodine or Caesium underwent thermal treatment (4h at 900°C or 1h at 1200°C) in a controlled atmosphere (Ar+0.03% H 2 O/H 2 ). Thereafter, the samples were analysed using a range of experimental techniques to study their structural and chemical evolution. Additionally, thermodynamic calculations were performed in order to optimize heat treatment conditions before performing tests, and to assist in the interpretation of results afterwards. The sample characterizations after thermal treatments reveal the following differences in the behaviour of Iodine and Caesium in UO 2 during heat treatment: i) precipitates are mainly observed in the case of samples implanted with Iodine, in contrast to Cs, where bubbles are mainly observed and ii) a very high release rate in the case of Caesium, unlike Iodine.
Source: Journal of Nuclear Materials
Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Cadarache, Institut de Recherche sur les Systèmes Nucléaires pour la production d'Energie bas carbone, École Polytechnique Fédérale de Lausanne, Aix-Marseille Université, European Synchrotron Radiation Facility, Centre National de la Recherche Scientifique, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris-Saclay, Groupe d’Étude de la Matière Condensée
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,640
OpenAlex ID: W4416822495