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In this paper, thermal conductivity measurements on hyperstoichiometric SIMFUEL and UO(2+x) are used to investigate the effects of excess oxygen on thermal properties. The thermal diffusivity and specific heat were measured on specimens annealed in controlled oxidising conditions, and combined to obtain the thermal conductivity values. The thermal conductivities of UO(2+x) and SIMFUEL were lower than expected and simulation of burn-up did not play any major role at high oxygen potentials. These measurements can be inserted into fuel performance models and used to evaluate the effect on central temperature and fission gas release.

Additional information

Authors: LUCUTA P G, AECL Research, Ontario (CA);VERRALL R A, AECL Research, Ontario (CA);MATZKE H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: IAEA Technical Committee Meeting on Water Reactor Fuel Element, Windermere (GB), September 19-23, 1994
Availability: Available from (1) as Paper EN 38651 ORA
Record Number: 199411329 / Last updated on: 1994-12-06
Original language: en
Available languages: en