Alkaline-permanganate process

摘要

An alkaline-permanganate process for chemically decontaminating oxidized metal surfaces wetted by primary water circulating in cooling loops of nuclear reactors maintains permanganate-containing primary water at a temperature of about 90 degrees C. and at a pH of 9-12 to oxidize the wetted surfaces. Oxalic acid is then added to the water and the oxalic acid-containing primary water is maintained at a temperature of at least about 90 degrees C. and at a pH of about 5-7 while it is circulated to destroy the permanganate ions and manganese dioxide.