Title: Fission product release and microstructure changes of irradiated MOX fuel at high temperatures
Authors: HIERNAUT JEAN-POLWISS ThierryCOLLE Jean-YvesBENES ONDREJTHIELE HartmutPAPAIOANNOU DimitriosRONDINELLA VincenzoSASAHARA AkihiroSONODA T.KONINGS Rudy
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 442 no. 1-3 p. 330-340
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2013
JRC N°: JRC81665
ISSN: 0022-3115
URI: http://www.sciencedirect.com/science/article/pii/S0022311513010970
http://publications.jrc.ec.europa.eu/repository/handle/JRC81665
DOI: 10.1016/j.jnucmat.2013.09.022
Type: Articles in periodicals and books
Abstract: Samples of irradiated MOX of 44 GWd/tHM mean burn-up were prepared by core drilling at three different radial positions of a fuel pellet. They were subsequently heated in a Knudsen effusion mass spectrometry system up to complete vaporization of the sample (~2600 K) and the release of fission gas (krypton and xenon) and helium was measured. Scanning electron microscopy was used in parallel to investigate the evolution of the microstructure of a sample heated in the same condition up to given key temperatures as determined from the gas release profiles. A clear difference for fission gas release and microstructure was observed as a function of the radial position of the samples and therefore of irradiation temperature. A good correlation between the microstructure evolution and the gas release could be established as a function of the temperature of irradiation and (laboratory) heating.
JRC Directorate:Nuclear Safety and Security

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