Compositions – Radioactive compositions – Nuclear reactor fuel
Patent
1982-09-03
1985-02-26
Kyle, Deborah L.
Compositions
Radioactive compositions
Nuclear reactor fuel
210682, 423 11, 423 12, G21F 910
Patent
active
045016917
ABSTRACT:
A process for treating a radioactive liquid waste is disclosed, in which a radioactive liquid waste containing uranium and .beta.-decay nuclides, daughter nuclides of uranium, is treated by combination of a flocculation method using water glass as pretreatment and a subsequent ion exchange method. An approximately total amount of the uranium and a part of the .beta.-decay nuclides, daughter nuclides of uranium, in the liquid waste are captured by an amorphous silica precipitate formed by addition of the water glass and a remaining part of the .beta.-decay nuclides, daughter nuclides of uranium, is captured thereafter by the ion exchange treatment. The thus captured radioactive materials are respectively eluted from the filtered out precipitate, a radioactive solid waste, and the ion exchanger by acid treatment to be recovered as an acidic solution. Thus, the radioactive materials in the liquid waste are recovered approximately completely, thereby making the radioactivities of a final drain remarkably reduced. The precipitate is then dissolved in an alkali metal hydroxide solution to make the amorphous silica constituting the precipitate regenerated to water glass.
REFERENCES:
patent: 4338286 (1982-07-01), Nakai et al.
patent: 4349513 (1982-09-01), Ishiwata et al.
Herald et al., "Evaluation of Organic and Inorganic Adsorbents . . . " in Management of Low-Level Radioactive Waste, vol. I, Pergammon Press 1979, pp. 399-410.
Takano Eiji
Tanaka Shoichi
Tanaka Yoshiharu
Brenner Edward J.
Kyle Deborah L.
Mitsubishi Kinzoku Kabushiki Kaisha
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