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The thermal conductivity of irradiated UO(2) fuel is discussed considering the effects of burnup (dissolved and precipitated solid fission products), porosity and fission-gas bubbles, deviation from stoichiometry and radiation damage based on single-effect results previously published on SIMFUEL (simulated extended burnup UO(2) fuel) and on radiation damage measurements. An analytical expression including factors describing the above effects is applied to the expression for unirradiated UO(2) thermal conductivity; it reflects the knowledge available today, and it is recommended for use with irradiated fuel. The expression is validated against available published data on thermal conductivity of irradiated fuel.

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Authors: LUCUTA P G, AECL Chalk River Laboratories (CA);HASTINGS I J, AECL Chalk River Laboratories (CA);MATZKE H, JRC Karlsruhe (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 232 (1996) pp. 166-180
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