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In-situ High Temperature X-ray Diffraction Study of the Am-O System

Published online by Cambridge University Press:  16 February 2017

E. Epifano ,
R. C. Belin ,
J-C Richaud ,
R. Vauchy ,
M. Strach ,
F. Lebreton ,
T. Delahaye ,
C. Guéneau  and
P. M. Martin
E. Epifano*
Affiliation:
CEA, DEN/DTEC/SECA/LCC, Cadarache, 13108 Saint-Paul-Lez-Durance, France
R. C. Belin
Affiliation:
CEA, DEN/DTEC/SECA/LCC, Cadarache, 13108 Saint-Paul-Lez-Durance, France
J-C Richaud
Affiliation:
CEA, DEN/DTEC/SECA/LCC, Cadarache, 13108 Saint-Paul-Lez-Durance, France
R. Vauchy
Affiliation:
CEA, DEN/DTEC/SECA/LCC, Cadarache, 13108 Saint-Paul-Lez-Durance, France
M. Strach
Affiliation:
CEA, DEN/DTEC/SECA/LCC, Cadarache, 13108 Saint-Paul-Lez-Durance, France
F. Lebreton
Affiliation:
CEA, DEN/DTEC/SECA/LCC, Cadarache, 13108 Saint-Paul-Lez-Durance, France
T. Delahaye
Affiliation:
CEA, DEN/DRCP/SERA/LCAR, Marcoule, 30207 Bagnols-sur-Cèze Cedex, France
C. Guéneau
Affiliation:
CEA, DEN/DPC/SCCME/LM2T, Saclay, 91191 Gif sur Yvette, France
P. M. Martin
Affiliation:
CEA, DEN/DTEC/SECA/LCC, Cadarache, 13108 Saint-Paul-Lez-Durance, France
*
*(Email: enrica.epifano@cea.fr)
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Abstract

In the frame of minor actinide recycling, (U,Am)O2 are promising transmutation targets. To assess the thermodynamic properties of the U-Am-O system, it is essential to have a thorough knowledge of the binary phase diagrams, which is difficult due to the lack of thermodynamic data on the Am-O system. Nevertheless, an Am-O phase diagram modelling has been recently proposed by Gotcu. Here, we show a recent investigation of the Am-O system using in-situ High Temperature X-ray Diffraction under controlled atmosphere. By coupling our experimental results with the thermodynamic calculations based on the Gotcu model, we propose for the first time a relation between the lattice parameter and the departure from stoichiometry.

Keywords

X-Ray diffractionactinideoxide
Type
Articles
Information
MRS Advances , Volume 1 , Issue 62: Scientific Basis for Nuclear Waste Management XXXIX , 2016 , pp. 4133 - 4137
Copyright
Copyright © Materials Research Society 2017 

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References

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