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Reduction of Gd6UO12 for the Synthesis of Gd6UO11

Published online by Cambridge University Press:  12 February 2013

Darío Pieck ,
Lionel Desgranges ,
Yves Pontillon  and
Pierre Matheron
Darío Pieck
Affiliation:
CEA, DEN, DEC, SESC – Laboratoire des Lois de Comportement des Combustibles.
Lionel Desgranges*
Affiliation:
CEA, DEN, DEC, SESC – Laboratoire des Lois de Comportement des Combustibles.
Yves Pontillon
Affiliation:
CEA, DEN, DEC, SA3C – Laboratoire d’Etudes de la Microstructure des Combustibles Irradiés.
Pierre Matheron
Affiliation:
CEA, DEN, DEC, SPUA – Laboratoire Combustible Uranium.
*
*Email address: lionel.desgranges@cea.fr, telephone: +33442253159, fax: +33442253285, postal address: CEA, DEN, DEC, Département d’Etudes des Combustibles, SESC/LLCC, bât. 352, F-13108 Saint Paul lez Durance, France.
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Abstract

In the present work, we focus on δ-Gd6UO12 phase and its stability under reducing conditions. This later point is interesting regarding reducing environment that could exist in some nuclear storage sites and that could possibly degrade δ–compounds. A polycrystalline δ-Gd6UO12 sample was prepared by sintering cubic-Gd2O3 and UO2 mixed powders under an air atmosphere. The resulting pellets were then characterized and reduced by heat treatment under an Ar with H2 5% atmosphere. XRD analysis of the sample after reduction did not confirm the reduction into Gd6UO11 but a decomposition of the δ-compound. Preliminary characterizations of these decomposition products are presented.

Keywords

compoundx-ray diffraction (XRD)scanning electron microscopy (SEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1514: Symposium HH – Advances in Materials for Nuclear Energy , 2013 , pp. 151 - 156
Copyright
Copyright © Materials Research Society 2013 

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References

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