Method for decontamination of nuclear plant components

Procede de decontamination de composants de centrales nucleaires

Abstract

A process for removing undesirable material such as a radioactive contaminant from an underlying material. A solution containing fluoroboric acid and a material which affects the fluoroboric acid solution oxidation potential (Eh) is contacted with the contaminant material to cause its removal. The contaminant material is removed from the fluoroboric acid solution by contacting the fluoroboric acid solution which has been contacted with the contaminant material with a cation exchange resin.
La présente invention concerne un procédé d'élimination de matériaux indésirables tels qu'un contaminant radioactif d'un matériau sous-jacent. Le procédé consiste à mettre en contact une solution contenant de l'acide fluoroborique et un matériau modifiant le potentiel d'oxydation (Eh) de la solution d'acide fluoroborique avec le matériau contaminant de façon à en provoquer l'élimination. Le procédé consiste ensuite à éliminer de la solution d'acide fluoroborique le matériau contaminant en mettant en contact avec une résine d'échange cationique la solution d'acide fluoroborique qui a été au contact du matériau contaminant.

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Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    US-4162229-AJuly 24, 1979Gesellschaft zur Forderung der Forschung an der Eidgenosslschen Technischen HochschuleDecontamination process
    US-4175011-ANovember 20, 1979Allied Chemical CorporationSulfate-free method of etching copper pattern on printed circuit boards
    US-4705573-ANovember 10, 1987Electric Power Research Institute, Inc.Descaling process
    US-4828759-AMay 09, 1989Jozef HanulikProcess for decontaminating radioactivity contaminated metallic materials
    US-5340505-AAugust 23, 1994Recytec SaMethod for dissolving radioactively contaminated surfaces from metal articles
    WO-8504279-A1September 26, 1985Studsvik Energiteknik AbDecontamination de reacteurs a eau sous pression

NO-Patent Citations (1)

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    See also references of EP 0859671A4

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    RU-2568895-C1November 20, 2015Открытое акционерное общество "Российский концерн по производству электрической и тепловой энергии на атомных станциях" (ОАО "Концерн Росэнергоатом")Способ очистки опускных трубопроводов барабан-сепараторов ядерного канального реактора
    WO-2004071681-A1August 26, 2004Cleansolve Holding Aps.A method of monitoring and controlling a cleaning process and a method of checking cleanliness