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AssigneeCogema-Compagnie Generale des Matieres Nucleaires
InventorsJacques Foos, Marc Lemaire, Alain Guy, Vincent Guyon, Rodolphe Chomel, Andre Delo Ge, Pierre Doutreluigne, Henri Le Roy
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The invention concerns the recovery of Pu (IV) by using crown compounds. According to the invention, the aqueous solution containing the plutonium (IV) is placed in contact with at least one crown compound, for example DCH 18C6, dissolved in an organic diluting agent, such as benzonitrile. In the case where the solution only contains traces of Pu, it is possible to use a crown compound secured to a solid phase, such as silica. The aqueous solution is a concentrated solution of fission products, an effluent originating from an irradiated nuclear fuel reprocessing installation or a concentrated solution of plutonium with americium.
Method to recover traces of plutonium (IV) present in an aqueous solution consisting essentially of either a concentrated solution of fission products derived from the first cycle for reprocessing irradiated nuclear fuels, or an aqueous effluent derived from an irradiated nuclear fuel reprocessing installation, wherein the aqueous solution is placed in contact with a solid phase including at least one crown compound so as to retain the plutonium on the solid phase.
Dependencies are inferred from the claim text.