| 摘要 |
PROBLEM TO BE SOLVED: To recover thorium metal by reducing thorium oxides.SOLUTION: A method for recovering a nuclear fuel material, which recovers a nuclear fuel material including a thorium metal, includes a first electrolytic reduction step S01 of electrolytically reducing thorium oxides in a first molten salt of an alkaline earth metal halide, a first reduced product cleaning step S02 of cleaning reduced products obtained in the step S01, and first and second separation steps S15 and S16 of separating the reduced products after the step S02. The first molten salt includes an alkali metal halide also and includes at least one of a calcium chloride, a magnesium chloride, a calcium fluoride, and a magnesium chloride. A second electrolytic reduction step S03 of electrolytically reducing uranium oxides, plutonium oxides, and minor actinoid oxides in a second molten salt of an alkali metal halide may be provided before the first electrolytic reduction step S01. |
