Abstracts and Available Papers Presented at the
1996 International RERTR Meeting
LEU FUEL DEVELOPMENT AT CERCA
Status as of October 1996
U5Si4 : A NEW PHASE IN THE U/Si DIAGRAM
JP. Durand - G. Olagnon - P. Colomb - Y. Lavastre - M.
Grasse
CERCA
ZI Les Berauds - 26104 Romans ( France )
and
H. Noel - V. Queneau
CNRS
Laboratoire de chimie du solide et inorganique moleculaire
Campus Beaulieu
Av. du General Leclerc, 35042 Rennes ( France )
ABSTRACT
A fundamental study has been carried out by CERCA and the French CNRS
( National Scientific Research Center ) as a partner in order to get a better
understanding of the U3Si2 casting process. On the
occasion of this study, a new binary phase, U5Si4,
has been discovered in the USi phase equilibrium diagram. Synthesis conditions
of U5Si4 have been determined and the impact of such
a discovery is evaluated regarding the production process of U3Si2
ingots. It can be concluded that keeping the CERCA's casting tools and within
the allowed limits of production parameters, the U3Si2 ingots
are homogenous without any detectable trace of U5Si4
even if a long term heat treatment at the hot rolling temperature is carried
out. On the production point of view, perfect knowledge of both metallurgical
phase synthesis and the casting process guarantee the quality of U3Si2
ingots and powder produced by CERCA.
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Contact:
Mr. J.P. Durand
CERCA
ZI les Berauds, BP 1114
26104 Romans Cedex, France
Tel.: +33-75.05.61.43
Fax: +33-75.05.25.36