Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Orano Cycle

Commissariat a L'energie Atomique

Comurhex Societe Pour La Conversion De L'uranium En Metal Et Hexafluorure

Universite Des Sciences Et Techniques De Lille Flandres Artois Ecole

Areva Nc

Francis Abraham

Murielle Rivenet

Marcel Boncoeur

Jean-Claude Boivin

Michel Kleitz

Jacques Fouletier

Gaetan Mairesse

Gerard Picard

Bertrand Morel

Bernard Rasneur

Mehdi Arab

Guy Nowogrocki

Thierry Plet

Stephane Grandjean

Pierre Blouet

Nicole Roux

Florent Blanchard

Gérard Picard

Rudy Thomas

David Amaraggi

Sylvie Delpech

Cyrine Slim

Catherine Renard

Jean-Francois Vigier

Annabelle Laplace

Guillaume Peter-Soldani

Isabelle Hablot

Nicolas Vigier

Stéphane Grandjean

Jean-François Vigier

A process is described for synthesizing a mixed peroxide or hydroxo-peroxide of an actinyl and at least one cation X, wherein the actinyl is a uranyl or neptunyl and the at least one cation Xis a di-, tri- or tetra-charged metal cation. This process includes the reaction in a solvent of a salt of the at least one cation Xwith a compound Cselected from mixed peroxides and hydroxo-peroxides of the actinyl and of at least one singly charged cation X, whereby compound Cis converted to the peroxide or hydroxo-peroxide by replacement of the at least one cation Xby said at least one cation X. Also disclosed is a process for synthesizing a mixed oxide of an actinide selected from uranium and neptunium, and of at least one metal able to form a di-, tri- or tetra-charged cation, which implements the preceding synthesis process. The disclosure further relates to a mixed peroxide or hydroxo-peroxide of an actinyl and of at least one di-, tri- or tetra-charged metal cation, and the use thereof for the preparation of a mixed oxide of an actinide and of at least this metal.

Process for the synthesis of a mixed peroxide or hydroxo-peroxide of an actinyl and of at least one doubly, triply or quadruply charged metal cation, mixed peroxide or hydroxo-peroxide thus obtained and uses thereof

A method for preparing a powder of a solid solution of dioxide of uranium and of at least one other actinide and/or lanthanide element comprising combusting a solution that comprises uranyl nitrate and at least one nitrate of the other actinide and/or lanthanide element and glycine, with the glycine being used in a predetermined amount so as to form, at the end of the combustion, the solid solution.

Process for preparing a powder comprising a solid solution of uranium dioxide and of a dioxide of at least one other actinide and/or lanthanide element

The invention relates to a process for manufacturing an oxychloride or oxide of actinide(s) and/or of lanthanide(s) from a chloride of actinide(s) and/or of lanthanide(s) present in a medium comprising at least one molten salt of chloride type comprising a step of bringing said chloride of actinide(s) and/or lanthanide(s) present in said medium comprising at least one molten salt of chloride type into contact with a wet inert gas.

Process for preparing an oxyhalogenide and/or oxide of actinide(s) and/or of lanthanide(s) from a medium comprising at least one molten salt

A method for converting UOand/or UOinto hydrated UOof formula UO.nHO wherein n is 2 or 4, comprising the following successive steps:

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The invention relates to ceramic materials usable as tritium producing material in a thermonuclear fusion reactor. These materials are constituted by lithium zirconate substituted by copper in the form of solid solutions of the type Li.sub.2 ZrO.sub.3. Preferably, they comply with the formula: ##EQU1##

Copper-substituted, lithium zirconate-based ceramic usable as a tritium

Compositions derived from BI4V2011

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Genech, France

Francis Abraham