Process for chemically decontaminating radioactively contaminated surfaces of a nuclear plant cooling system using an organic acid followed by an anionic surfactant
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United States of America Patent
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Jan 15, 2013
Grant Date -
Dec 15, 2011
app pub date -
Aug 17, 2011
filing date -
Feb 18, 2009
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Abstract
A process is provided for chemically decontaminating the surface of a metallic component. In a first treatment step, an oxide layer formed on the component by corrosion of the material of the component is detached from the surface of the component with a first aqueous treatment solution containing an organic decontamination acid. In a subsequent second treatment step, the surface which is at least partially freed of the oxide layer is treated with an aqueous solution containing an active component for removing particles which adhere to the surface. The active component is formed of at least one anionic surfactant from the group including sulphonic acids, phosphonic acids, carboxylic acids and salts of those acids.
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