| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a process for reducing ferric ion to ferrous ion, to provide a decomposition velocity higher than that by oxalic acid, and to provide decontamination performance equivalent to that of oxalic acid. SOLUTION: This method/system is provided with a reduction-dissolving process S2 for bringing a surface of a radioactive chemical having a radioactive oxide skin on its surface into contact with a reducing decontaminant solution dissolved with a mono-carboxylic acid and a dicarboxylic acid, and an oxidation-dissolving process S6 for bringing the surface of the radioactive chemical into contact with an oxidizing decontaminant solution dissolved with an oxidant. COPYRIGHT: (C)2004,JPO
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