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|Title:||Effect of burn-up on the thermal conductivity of uranium-gadolinium dioxide up to 100 GWd/tHM|
|Authors:||STAICU Dragos; RONDINELLA Vincenzo; WALKER CLIVE; PAPAIOANNOU Dimitrios; KONINGS Rudy; RONCHI C.; SHEINDLIN Michael; SASAHARA A.; SONODA T.; KINOSHITA M.|
|Citation:||JOURNAL OF NUCLEAR MATERIALS vol. 453 no. 1-3 p. 259-268|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in periodicals and books|
|Abstract:||The thermal diffusivity of reactor irradiated (U,Gd)O2 fuels has been measured, for burn-ups from 33 to 97 GWd tHM-1 and for irradiation temperatures from 670 to 1580 K. Measurements under thermal annealing cycles were performed in order to investigate the recovery of the thermal conductivity as a function of temperature. The analysis of the results showed a lower thermal conductivity for (U,Gd)O2 when compared to UO2, with similar effects of the burn-up and irradiation temperature. A correlation for the thermal conductivity could be proposed on the basis of that for UO2 presented in an earlier work, which describes the separate effects of soluble fission products, of fission gas frozen in dynamical solution and of radiation damage.|
|JRC Directorate:||Nuclear Safety and Security|
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