Commissariat a L'energie Atomique

Jacques Duhayon

Edmond Zellner

Jean-Pierre Goumondy

Andre Leseur

Maurice Tarnero

Maurice Anav

Michel Jean Jacques

Pierre Michel

Alain Leudet

Jean-Claude Rousseau

The method for processing a mixture of air and rare gases consisting especially of xenon and krypton which are at least partially radioactive and especially for processing gaseous effluents arising from the reprocessing of irradiated fuels comprises a step involving concentration of the rare gases in solution in liquid argon by cryogenic distillation of the light gases and mainly nitrogen from the liquefied mixture.

Method for processing a mixture of air and rare gases, especially xenon

After dissolving irradiated nuclear fuel in a nitric acid medium, the vapor produced by this dissolution and consisting of water, nitrogen oxides and iodine is passed into a condenser, then into a column for the absorption of the nitrous vapor in which is formed recombined nitric acid containing iodine and nitrous ions, the iodine contained in the recombined acid being then separated-out. The nitrous ions present in the recombined acid have a favorable influence on the important first stage of that separation.

Method of extraction, trapping and storage of radioactive iodine

The method of recovery of hydrogen chloride in gaseous form from an organic solvent loaded with hydrochloric acid in a dilute aqueous solution consists in carrying out prior to distillation a dehydration of the loaded organic solvent in a dehydration extractor in which the solvent is circulated countercurrent to an aqueous solution having a high chloride concentration.

Method for recovery of hydrogen chloride from dilute solutions

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Clamart, France

Jacques Duhayon