Experimental Study on U-Pu Cocrystallization Reprocessing Process

Abstract

A new reprocessing system with a 2-stage crystallization process has been developed. In the first stage of the system, U and Pu are recovered from dissolver solution by U-Pu cocrystallization. Laboratory-scale experiments were carried out with U and Pu mixed and irradiated fuel dissolver solutions to obtain fundamental data on the U-Pu cocrystallization process. Pu(VI) was cocrystallized with U, but crystallization yields of Pu were lower than those of U. FPs were separated from U and Pu by cocrystallization, and decontamination factors of Cs and Eu to U in crystals were over 100.

KEYWORDS:

• uranium
• plutonium
• crystallization
• reprocessing process
• crystallization yield
• decontamination factor