Process for the recovery of plutonium contained in solid waste

Details Process for the recovery of plutonium contained in solid waste Process for the recovery of plutonium contained in solid waste

1987-05-07

1988-06-07

Lechert, Jr., Stephen J.

Compositions

Radioactive compositions

204 15, 252626, 423 20, 423251, C25C 122, G21C 1944, G21C, G21C, G21F 900

Patent

active

047495197

ABSTRACT:
The invention relates to a process for recovering the plutonium contained in the solid waste, such as process, technological and laboratory waste.
The waste is contacted with aqueous nitric acid solution having a nitric acid concentration of 2 to 8 mole/l, which contains a compound of Ag.sup.2+ soluble in the solution, for oxidizing the plutonium present in the waste and for dissolving same in the nitric solution.
Preferably, contacting takes place in an electrolytic cell having an anode and a cathode, by applying a potential difference between anode and cathode which is sufficient to continuously regenerate the Ag.sup.2+ ions used for oxidizing the elements present in said waste.

REFERENCES:
patent: 3490999 (1970-01-01), Raviv et al.
patent: 3669631 (1972-06-01), Dietrich et al.
patent: 3891741 (1975-06-01), Carlin et al.
patent: 3922231 (1975-11-01), Carlin et al.
patent: 3948735 (1976-04-01), Hayden et al.
patent: 3976775 (1976-08-01), Tallent
patent: 4021313 (1977-05-01), Hausberger et al.
patent: 4069293 (1978-01-01), Tallent
Ryan et al., 1979, Dissolution of Plutonium Dioxide-A Critical Review, Pacific Northwest Laboratory, ACS Symposium Series 117, pp. 499-514.

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