Method of making a composite nuclear fuel material consisting of dispersed (u,pu)o2 aggregates
AssigneesCommissariat a l'Energie Atomique, Compagnie Generalc des Matieres Nucleaires
InventorsMarie-Jeanne Gotta, Gregoire Toury, Maria Trotabas
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Abstract
The invention relates to a production process of a composite material composed of aggregates of a blend of UO2 and of PuO2 dispersed in a UO2 matrix comprising the steps of dry co-grinding of a UO2 powder and of a PuO2 powder in order to obtain a homogenous primary blend, of consolidating the primary blend in order to obtain cohesive aggregates, of sieving the aggregates in a range of 20 to 350 μm, of diluting the sieved aggregates in a UO2 matrix in order to obtain a powder blend, of pelletising the powder blend and of sintering the pellets obtained in order to obtain the composite.
Claims16
Process for producing a composite material consisting of aggregates of a blend of ground UO2 and PuO2 powders dispersed in a UO2 matrix, comprising the following steps of:
- (a) dry co-grinding a UO2 powder and a PuO2 powder so as to obtain a homogenous primary blend,
- (b) consolidating the primary blend so as to obtain cohesive aggregates of the UO2—PuO2 blend,
- (c) sieving the aggregates between 20 and 350 μm,
- (d) diluting the sieved aggregates in a UO2 matrix so as to obtain a powder blend,
- (e) pelletising the powder blend, and
- (f) sintering the pellets obtained in order to obtain the composite.
Dependencies are inferred from the claim text.