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|Title:||Fission Product Release in High-Burnup UO2 Oxidised to U3O8|
|Authors:||COLLE JEAN-YVES; HIERNAUT JEAN-POL; PAPAIOANNOU DIMITRIOS; RONCHI Claudio; SASAHARA A.|
|Citation:||JOURNAL OF NUCLEAR MATERIALS vol. 348 p. 229-242|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in periodicals and books|
|Abstract:||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.|
|JRC Directorate:||Nuclear Safety and Security|
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