METHOD FOR THE SURFACE DECONTAMINATION OF COMPONENT PARTS OF THE COOLANT CYCLE OF A NUCLEAR REACTOR
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United States of America Patent
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Dec 17, 2015
app pub date -
Dec 11, 2013
filing date -
Jan 30, 2013
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Abstract
The invention relates to a process for the chemical decontamination of a surface, having an oxide layer of a metallic component of the coolant system of a nuclear power station, which comprises at least one oxidation step in which the oxide layer is treated with an aqueous solution containing an oxidant and a subsequent decontamination step in which the oxide layer is treated with an aqueous solution of a decont. acid which has the property of forming a sparingly soluble precipitate with metal ions, in particular with nickel ions. Prior to carrying out the decontamination step, metal ions which have gone into solution during the oxidation step are removed from the aqueous solution by means of a cation exchanger.
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