Abstract: Using Na₃PO₄ solution as electrolyte, effect of NaCl additive and its concentration on the decontamination abilityof an electrochemical process for radioactive contaminated stainless steel sheet was investigated. The results indicate that the decontaminate factor increaseswith the extension of time, and also with the addition of NaCl. The weight lossrate of stainless steel sheets with NaCl additive is always higher. While NaClconcentrations are 200 g/L and 250 g/L, the decontaminate factor and weight lossrate reach the max of 13.7 and 2.21% respectively. It shows that NaCl with a certain concentration can help improve the decontamination ability of Na₃PO₄ electrolyte.

Key words: Decontamination, Electrolyte, Electrochemical Method, Radioactive contamination, NaCl Additive