Technique of Chemical Cleaning for Removing Corrosion Products in Nuclear Reactor (PWR)

Abstract

The study of chemical cleaning technique for removing corrosion products in PWR type plant and power reactor have been carried in China Institute of Atomic Energy (CIAE), Beijing. The report summarizes the results of screening test and qualification test of chemical cleaning technique, and the results of chemical cleaning to remove corrosion products (Fe3O4) in primary side of PWR type power reactor which chemical cleaning process has been carried by CIAE. The chemical cleaning agent (EDTA + assistant agent + inhibitor ) is effective for removing magnetite (Fe3O4 < 17.5g/l).The process of chemical cleaning includes cleaning, rinse, passivation. The corrosion rate of materials is acceptable. The chemical cleaning technique is effective and safe for PWR type reactor.