Method of decontaminating radioactive metal surfaces

Details Method of decontaminating radioactive metal surfaces Method of decontaminating radioactive metal surfaces

1985-11-29

1988-03-08

Terapane, John F.

Compositions

Radioactive compositions

376309, 376310, 134 2, G21F 900

Patent

active

047298553

ABSTRACT:
Disclosed is a method of decontaminating metal surfaces contaminated with a radioactive deposit by passing over the coating an aqueous solution of a water soluble condensation reaction product of (1) a hydrazine compound having the general formula ##STR1## where each R group is independently selected from hydrogen and alkyl to C.sub.4 and (2) a water soluble aliphatic polycarboxylic acid. The method includes the additional last steps of passing an aqueous oxidizing solution over the deposit followed by passing a decontamination solution over the deposit a second time. The solution is circulated through a cationic exchange column which can be preloaded with hydrazine ion. The decontamination solution can be decomposed by the addition of an oxidant to form nitrogen, carbon dioxide, and water.

REFERENCES:
patent: 3297580 (1967-01-01), Pitzer
patent: 3873362 (1975-03-01), Mihram et al.
patent: 4252959 (1981-02-01), Spitzner
patent: 4512921 (1985-04-01), Anstine et al.
Tallent et al., "An Alternate Solvent Cleanup Method Using a Hydrazine Oxalate Wash Reagent", Nuclear Tech., vol. 59, Oct. 1982, pp. 51-62.

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