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dc.contributor.authorWALKER CLIVEen_GB
dc.contributor.authorSTAICU DRAGOSen_GB
dc.contributor.authorSHEINDLIN Mikhailen_GB
dc.contributor.authorPAPAIOANNOU DIMITRIOSen_GB
dc.contributor.authorGOLL W.en_GB
dc.identifier.citationJOURNAL OF NUCLEAR MATERIALS vol. 350 p. 19-39en_GB
dc.description.abstractA study of the thermal conductivity of a commercial PWR fuel with an average pellet burn-up of 102 MWd/kgHM is described. The thermal conductivity data reported were derived from the thermal diffusivity measured by the laser flash method. The factors determining the fuel thermal conductivity at high burn-up were elucidated by investigating the recovery that occurred during thermal annealing. It was found that the thermal conductivity in the outer region of the fuel was much higher than it would have been if the high burn-up structure were not present. The increase in thermal conductivity is a consequence of the removal of fission products and radiation defects from the fuel lattice during recrystallisation of the fuel grains (an integral part of the formation process of the high burn-up structure). The gas porosity in the high burn-up structure lowered the increase in thermal conductivity caused by recrystallisation.en_GB
dc.description.sponsorshipJRC.E.2-Hot cellsen_GB
dc.publisherElsevier B.V.en_GB
dc.titleOn the Thermal Conductivity of UO2 Nuclear Fuel at a High Burn-up of around 100 MWd/kgHMen_GB
dc.typeArticles in periodicals and booksen_GB
JRC Directorate:Nuclear Safety and Security

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