학술논문
Recovery of actinides from their dioxides using organic reagents saturated with nitric acid.
Document Type
Article
Author
Source
Subject
*NITRIC acid
*ACTINIDE elements
*URANIUM
*ORGANIC wastes
*BIOLOGICAL reagents
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Language
ISSN
1066-3622
Abstract
The TBP-HNO3 and N,N′-dimethyl- N,N′-dioctylhexylethoxymalonamide-HNO3 adducts effectively recovery actinides from solid solutions of their oxides in UO2 matrix. The adduct of methyl isobutyl ketone and HNO3 selectively recovers uranium from PuO2-UO2 solid solution, separating uranium from plutonium. The optimal composition of TBP-HNO3 adducts for the recovery of actinides from the dioxide solid solutions was determined. Uranium is recovered with the adduct more rapidly at lower temperatures and smaller volume of the organic phase, as compared to the dissolution of the oxide fuel in aqueous nitric acid. This approach to the processing of spent nuclear fuel can substantially decrease the volume of highly toxic radioactive aqueous and organic wastes arising with the existing technologies. [ABSTRACT FROM AUTHOR]