Thermal diffusivity measurements on UO$_2$ fuels with the flash method
Résumé
Thermal conductivity of the nuclear fuel :
-A key parameter to understand the performance of the fuel under irradiation
-Highly dependent on microstructure, porosity and its distribution
-Influences almost all important processes such as fission gas release, swelling
Knowledge of the nuclear fuel thermal conductivity (derived from a thermal diffusivity measurement):
- A fundamental data for a better prediction of fuel performance in reactor
- Must be measured accurately (including a reliable uncertainty assessment
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