Title: Computer Simulations of Non-congruent Melting of Hyperstoichiometric Uranium Dioxide
Authors: WELLAND M.THOMPSON W. T.LEWIS B. J.MANARA Dario
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 385 p. 358-363
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2009
JRC N°: JRC51024
ISSN: 0022-3115
URI: http://www.elsevier.com/locate/jnucmat
http://publications.jrc.ec.europa.eu/repository/handle/JRC51024
DOI: 10.1016/j.jnucmat.2008.12.023
Type: Articles in periodicals and books
Abstract: Detailed models of UO2+x at very high temperatures incorporating the effects of non-congruent melting have been developed to support the design and analysis of experimental work related to nuclear safety. Models based on both the Stefan formulation and phase field approach are implemented using recently published material properties. Simulations compare well with laser flash experiments performed on UO2+x. This work has application in modelling centreline melting of defective fuel which may occur due to the reduced thermal conductivity and lower incipient melting temperature associated with fuel oxidation.
JRC Directorate:Nuclear Safety and Security

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