Method for decontaminating surfaces, which have been...

Details Method for decontaminating surfaces, which have been... Method for decontaminating surfaces, which have been...

G - Physics

21

F

G21F 9/00 (2006.01) G21F 9/12 (2006.01) G21F 9/28 (2006.01)

Patent

CA 2695691

The invention relates to a method for decontaminating surfaces, which have been contaminated with alpha emitters, of nuclear plants, which method is carried out subsequently to a decontamination process which is aimed at the removal of oxide layers. The surfaces are treated with an aqueous solution which contains a cationic or zwitterionic surfactant and oxalic acid, wherein at least a part of the solution, after having acted on a surface, is conducted across an ion exchanger.

L'invention concerne un procédé de décontamination de surfaces d'installations nucléaires contaminées par des rayons alpha, procédé mis en oeuvre comme complément à un procédé de décontamination ayant pour but d'éliminer les couches d'oxydes. Le procédé est caractérisé en ce que les surfaces sont traitées par une solution aqueuse renfermant un agent tensio-actif cationique ou ionique dipolaire et de l'acide oxalique, et en ce qu'au moins une partie de la solution est envoyée, après avoir agi sur une surface, sur un échangeur d'ions.

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