A Method For Concentrated Chemical Decontamination and Diluted Chemical Decontamination of SS304 Material Device Contaminated By Radioactive Substance

摘要

The present invention relates to a concentration type chemical decontamination method and huiseoksik chemical decontamination method for the apparatus of the SS304 series material contaminated with radioactive substances, by using nitric acid and permanganate potassium performing the oxidation step, the oxidation step is carried out a predetermined time the process can oxalate (oxalic acid), or nitric acid and oxalic acid (oxalic acid) for a predetermined time to perform chemical degradation step and the chemical degradation of oxalic acid in a process water solution to perform a step (oxalic acid) and citric acid (Citric acid is using ), and, without affecting the material quality of lithium hydroxide (LiOH) is repeated several times that consists of equipment (such as reactor coolant pumps, and so on) that a unit process composed of the reduction process is carried out a predetermined time using the most of the chemical decontamination and at the same time there is an effect that the process water purification treatment possible.