Compagnie Generale Des Matieres Nucleaires

Cogema Compagnie Generale Des Matieres Nuclearies

Andre Deloge

Marc Lemaire

Jacques Foos

Alain Guy

Rodolph Chomel

Vincent Guyon

Rodolphe Chomel

Micheline Draye

Pierre Doutreluigne

Henri Le Roy

Pierre Doutreluingne

The invention relates to a process fop trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels. This process consists of contacting a gas containing ruthenium in gaseous form with an adsorbent (11b) constituted by a vinyl pyridine polymer or copolymer for fixing the ruthenium to the latter. The gas can be constituted by yapours from a concentrate of fission products containing ruthenium, which has been heated (at 31) in the presence of an oxidizing agent for volatilizing the ruthenium.

Process for trapping gaseous ruthenium on polyvinyl pyridine, more

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 for recovering with the aid of a crown compound plutonium (IV)

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Bagnols/Ceze, France

Andre Deloge