Title: Modelling actinide redistribution in mixed oxide fuel for sodium fast reactors
Authors: DI MARCELLO ValentinoRONDINELLA VincenzoSCHUBERT ArndtVAN DE LAAR JacquesVAN UFFELEN Paul
Citation: PROGRESS IN NUCLEAR ENERGY vol. 72 p. 83-90
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2014
JRC N°: JRC85884
ISSN: 0149-1970
URI: http://www.sciencedirect.com/science/article/pii/S0149197013002011
http://publications.jrc.ec.europa.eu/repository/handle/JRC85884
DOI: 10.1016/j.pnucene.2013.10.008
Type: Articles in periodicals and books
Abstract: In this paper, a model for the actinide redistribution mechanism in mixed oxide fuel for a SFR is presented and compared with measured data collected from post irradiation examination on fuel from the JOYO experimental reactor. The model considers that solid-state thermal diffusion and vapour transport can simultaneously contribute to the plutonium and americium radial profiles. The effect of fuel stoichiometry on actinide transport as well as on pore velocity is taken into account. The model is embedded into the TRANSURANUS fuel rod performance code and calculates the evolution of the Am and Pu concentrations as a function of the radial temperature profile. The calculated actinide distribution is in good agreement with the experimental data. The results confirm that under normal operation conditions with a decreasing fuel power during its life-time, redistribution via pore migration is extremely important only during the central hole formation at the beginning of life, whereas thermal diffusion represents the dominant effect for long-term irradiation.
JRC Directorate:Nuclear Safety and Security

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