Noble metal chemical addition (NMCA) technology has been widely adopted for BWR plants in the US as a means to mitigate stress corrosion cracking (SCC). Dose rate of the reactor water recirculation system piping of some BWR plants that apply a combination of NMCA and zinc injection technology have gradually decreased. Chemical decontamination removes 60Co, but also the noble metal from the piping surfaces. Thus, effect of dose rate reduction by NMCA is decreased in the plant operating period after che...
英字タイトル:
Development of suppression method for deposition of radioactive nuclides after chemical decontamination by platinum deposition treatment

Method of simultaneous chemical decontamination of stainless and carbon steel was developed to reduce dose exposure and to reduce radioactive waste during nuclear power plant decontamination. New chemical decontamination is conducted by using reducing agent containing oxalic acid and oxidizing agent containing permanganate ion repeatedly, then, conducted by using 2000 mg/L of malonic acid. It was confirmed that Co-60 deposited on test pieces, which had been prepared in high temperature high pressure lo...
英字タイトル:
Development of Chemical Decontamination Technique for Decommissioning