Title: An experimental study of grain growth in mixed oxide samples with various microstructures and plutonium concentrations
Authors: VAN UFFELEN PaulBOTAZZOLI P.LUZZI LelioBREMIER StephanSCHUBERT ArndtRAISON PhilippeELOIRDI RachelBARKER M.
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 434 p. 287 - 290
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2013
JRC N°: JRC72561
ISSN: 0022-3115
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC72561
DOI: http://dx.doi.org/10.1016/j.jnucmat.2012.11.053
Type: Articles in periodicals and books
Abstract: Samples of (U,Pu) Mixed OXide with various microstructure and plutonium contents ranging between 4 and 25 % have been submitted to a series of heating experiments in order to assess grain growth between 1350 and 1750 oC. Complementary XRD measurements on the same samples indicated that they were not affected by modifications in the oxygen-to-metal ratio during the annealing experiments. The grain size distributions inferred by means of image analysis of metallographic pictures reveal that, when taking into account the experimental uncertainties, the grain growth kinetics are similar to those observed in conventional UO2 fuel that was also tested under the same conditions. An analysis of the experimental data available in the open literature for FBR MOX fuel, as well as for SBR MOX fuel submitted to power ramps in a LWR leads to the same conclusion. It can therefore be suggested that grain growth models for UO2 fuel can be applied to MOX fuel for fuel performance simulations.
JRC Directorate:Nuclear Safety and Security

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