Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – Treating radioactive liquid
Patent
1993-04-13
1996-06-04
Mai, Ngoclan
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
Treating radioactive liquid
588 1, 20415743, 210682, 976DIG380, 976DIG392, 423 20, G21F 900
Patent
active
055235140
ABSTRACT:
The invention relates to the dissolving of plutonium and/or other radioactive elements in an aqueous solution by microwave heating.
According to the invention, solid or liquid products containing plutonium and/or other radioactive elements are introduced into a container (7) containing an acid solution, comprising hydrofluoric acid and nitric solution, followed by the microwave heating of the solution containing these products using a chamber or tank (5) placed in a tight enclosure (1), which is supplied with microwaves by means of a coaxial cable or a waveguide (11) connected to the generator (9) located outside the enclosure.
The solid products can be plutonium dioxide PuO.sub.2 or organic or mineral radioactive waste materials such as gloves, cellulose products, ion exchange resins, etc. The liquid products can be contaminated organic solvents such as tributyl phosphate in dodecane.
REFERENCES:
patent: 3629135 (1971-12-01), Wilding
patent: 3669631 (1972-06-01), Dietrich et al.
patent: 3778497 (1973-12-01), Deaton et al.
patent: 3957676 (1976-05-01), Cooley et al.
patent: 4439402 (1984-03-01), Tarutani et al.
patent: 5154899 (1992-10-01), Sturcken
Chemical Abstracts, vol. 100, No. 8, Mar., 1984, Columbus, Ohio, US; Abstract No. 58602x, "Thermal Denitration Apparatus for Metal Nitrates", p. 444, col. 2 & JP-A-58 135 108 (Power Reactor and Nuclear Fuel Development Corp.) 11 Aug. 1983.
Chemical Abstracts, vol. 95, No. 11, Nov., 1981, Columbus, Ohio, US; Abstract No. 194213, "Apparatus for Metal Nitrate Decomposition During Reactor Fuel Processing" & JP-A-81 54 231 (Tokyo Shibaura Electric Co.) 14 Apr. 1981.
Cauquil Gerard
Sourrouille Michel
Compagnie Generale des Matieres Nucleaires (Cogema)
Mai Ngoclan
LandOfFree
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