Title: Thermal properties of irradiated UO2 and MOX fuels
Authors: STAICU Dragos
Publisher: Elsevier's Science Direct
Publication Year: 2012
JRC N°: JRC58590
ISBN: 978-0-08-056027-4
URI: http://www.elsevier.com/wps/find/bookdescription.cws_home/726301/description#description
Type: Articles in periodicals and books
Abstract: The thermal conductivity of UO2 and MOX LWR fuels decreases as a result of reactor burn-up. In this chapter, the phenomena causing this degradation are presented and the effect of the most influent parameters is discussed. Information useful for the interpretation and comparison of in-pile or out-of-pile measurements is given, especially as a function of burn-up and for samples having different irradiation temperatures, in-pile histories and microstructures. The impact of the introduction of plutonium or additives (Gd, Cr) in standard UO2 is also addressed. The evolution of the thermal conductivity as a function of burn-up is non-linear and the numerous approaches and approximations that are used to obtain thermal conductivity correlations are summarised and compared.
JRC Directorate:Nuclear Safety and Security

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