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METHOD OF PRODUCING NUCLEAR FUEL METAL FROM OXIDE NUCLEAR FUEL USING LiCl-Li2O MOLTEN SALT SYSTEM, REDUCTION ELECTRODE FOR EMBODYING THE METHOD AND REDUCTION DEVICE COMPRISING THE REDUCTION ELECTRODE
METHOD OF PRODUCING NUCLEAR FUEL METAL FROM OXIDE NUCLEAR FUEL USING LiCl-Li2O MOLTEN SALT SYSTEM, REDUCTION ELECTRODE FOR EMBODYING THE METHOD AND REDUCTION DEVICE COMPRISING THE REDUCTION ELECTRODE
PPROBLEM TO BE SOLVED: To provide a method wherein a metal conversion stage and an Li recovery stage for oxide nuclear fuel can be integrated using a new LiCl-LiSB2/SBO molten salt system as a method for recovering nuclear fuel metal from nuclear fuel after the use of oxide. PSOLUTION: In the LiCl-LiSB2/SBO molten salt system, Li metal and gaseous oxygen are generated from LiSB2/SBO at 600 to 700°C under a voltage of ≥-2.592 V by electrolytic reaction (stage 1), the Li metal produced in the stage 1 is reacted with uranium oxide to produce LiSB2/SBO, and simultaneously, uranium metal is produced (stage 2): yLiSB2/SBO→2yLi+(y/2)OSB2/SB(stage 1); and USBx/SBOSBy/SB+2yLi→xU+yLiSB2/SBO (stage 2). The metal conversion stage and Li recovery stage for oxide nuclear fuel using Li metal are integrated to simplify the process, and the safety of the process improves by eliminating the utilization of Li metal having high oxidizability, so that the metal conversion rate of oxide nuclear fuel can be controlled to ≥99%. PCOPYRIGHT: (C)2005,JPO&NCIPI
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