Alkaline-permanganate process

Details Alkaline-permanganate process Alkaline-permanganate process

1992-11-20

1994-01-11

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fission reactor material treatment

Impurity removal

376305, G21C 1942

Patent

active

052787435

ABSTRACT:
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.degree. 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.degree. C. and at a pH of about 5-7 while it is circulated to destroy the permanganate ions and manganese dioxide.

REFERENCES:
patent: 4731124 (1988-03-01), Bradbury et al.
patent: 5093073 (1992-03-01), Schenker

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