Results of oxidation experiments on high burn-up UO2 are presented where fission-product vaporization and release rates have been measured by on-line mass spectrometry as a function of time/temperature during thermal annealing treatments in a Knudsen-cell under controlled oxygen atmosphere. Fractional release curves of fission gas and other less volatile fission products in the temperature range 800 - 2000 K were obtained from BWR fuel samples of 65 GWd¿t-1 burn-up and oxidized to U3O8 at low temperature. The diffusion enthalpy of gaseous fission products and helium in different structures of U3O8 was determined.
COLLE Jean-Yves;
HIERNAUT Jean-Pol;
PAPAIOANNOU Dimitrios;
RONCHI Claudio;
SASAHARA A.;
2006-05-23
ELSEVIER SCIENCE BV
JRC30234
https://publications.jrc.ec.europa.eu/repository/handle/JRC30234,
10.1016/j.jnucmat.2005.09.024,
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