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

Orano Recyclage

Bénédicte Arab-Chapelet

Thibaud Delahaye

François Poncelet

Thierry Loiseau

Nicolas Vigier

Aurélie Gauthe

Eléonore Welcomme

Marie Hélène Noire

Gaël Loubert

A method for preparing a powder comprising an intimate mixture of UOparticles and PuOparticles and which may further comprise particles of ThOor NpO. The method comprises: preparing, via oxalic precipitations, an aqueous suspension Sof particles of uranium(IV) oxalate and an aqueous suspension Sof particles of plutonium(IV) oxalate; mixing the aqueous suspension Swith the aqueous suspension Sto obtain an aqueous suspension S; separating the aqueous suspension Sinto an aqueous phase and a solid phase comprising the particles of uranium(IV) oxalate and the particles of plutonium(IV) oxalate; and calcining the solid phase to convert (1) the particles of uranium(IV) oxalate to particles of triuranium octoxide and (2) the particles of plutonium(IV) oxalate to particles of plutonium(IV) dioxide, whereby the powder is obtained.

Method for preparing a powder comprising particles of triuranium octoxide and particles of plutonium dioxide

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Bagnols sur Ceze, France

Bénédicte Arab-Chapelet