Structural features in mixed uranium oxides with fluorite-related structures.

Abstract : Research on mixed oxide compounds of Uranium with fluorite-related structure is important for developing reliable and safe nuclear energy systems. These compounds can be source of controversy (e.g. MOX), though burning hazardous elements is a sensible way to dispose of them. Blending U and aliovalent atoms in the oxide fuel also occurs for controlling excess reactivity with burnable poisons, or for reducing fission gas release by controlling the microstructure. Fuels containing significant amounts of aliovalent elements require a sound understanding of their long range and local structures throughout the fuel life cycle (fabrication, operation, and end-of-life storage). Predicting these evolutions is challenging, even for changes occurring at moderate temperatures because they involve both O migration and cation reorganization. Uranium oxides have deceptively simple approximate chemical formulas betraying their complex structural features. To illustrate these problems we discuss selected systems, emphasizing the need to foster further experimental and theoretical work.
Type de document :
Communication dans un congrès
2019 TMS Annual Meeting & Exhibition. Symposium: Ceramic Materials for Nuclear Energy Research and Applications, Mar 2019, San Antonio, United States. 〈https://www.tms.org/TMS2019〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01930170
Contributeur : Gianguido Baldinozzi <>
Soumis le : mercredi 21 novembre 2018 - 16:24:43
Dernière modification le : mercredi 23 janvier 2019 - 14:38:26

Identifiants

  • HAL Id : hal-01930170, version 1

Citation

Gianguido Baldinozzi. Structural features in mixed uranium oxides with fluorite-related structures.. 2019 TMS Annual Meeting & Exhibition. Symposium: Ceramic Materials for Nuclear Energy Research and Applications, Mar 2019, San Antonio, United States. 〈https://www.tms.org/TMS2019〉. 〈hal-01930170〉

Partager

Métriques

Consultations de la notice

56