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In situ Characterization of UO2 Microstructure Changes During an Annealing Test in an Environmental Scanning Electron Microscope

Published online by Cambridge University Press:  31 January 2011

Mathieu Marcet ,
Yves Pontillon ,
Lionel Desgranges ,
David Simeone ,
Isabelle Aubrun ,
Isabelle Felines  and
Laurent Brunaud
Mathieu Marcet
Affiliation:
mathieu.marcet@cea.fr, Commissariat à l’Energie Atomique, Centre de Cadarache, Saint-Paul-lez-Durance, France
Yves Pontillon
Affiliation:
yves.pontillon@cea.fr, Commissariat à l’Energie Atomique, Centre de Cadarache, Saint-Paul-lez-Durance, France
Lionel Desgranges
Affiliation:
lionel.desgranges@cea.fr, Commissariat à l’Energie Atomique, Centre de Cadarache, Saint-Paul-lez-Durance, France
David Simeone
Affiliation:
david.simeone@cea.fr, CEA, DEN/DANS/DMN/SRMA/LA2M-MFE, Gif sur Yvette, 91191, France
Isabelle Aubrun
Affiliation:
isabelle.aubrun@cea.fr, Commissariat à l’Energie Atomique, Centre de Cadarache, Saint-Paul-lez-Durance, France
Isabelle Felines
Affiliation:
isabelle.felines@cea.fr, Commissariat à l’Energie Atomique, Centre de Cadarache, Saint-Paul-lez-Durance, France
Laurent Brunaud
Affiliation:
laurent.brunaud@cea.fr, Commissariat à l’Energie Atomique, Centre de Cadarache, Saint-Paul-lez-Durance, France
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Abstract

A 1 μg High Burn Up Structure (HBS) fragment was extracted from a UO2 fuel pellet irradiated for 7 cycles in a EDF Pressurised Water Reactor (PWR). In situ examinations were performed with an Environmental Scanning Electron Microscope (ESEM) in order to characterize UO2 microstructure evolution during a temperature ramp up to 1,600K. The results are compared to previously published data on HBS annealing tests performed in a Knudsen cell where observed burst releases are explained as sample cracking during the experimental sequence.

Keywords

nuclear materialsannealingscanning electron microscopy (SEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1215: Symposium V – Materials Research Needs to Advance Nuclear Energy , 2009 , 1215-V16-44
Copyright
Copyright © Materials Research Society 2010

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