| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a uranium-recovery method without new generation of radioactive waste liquid or waste solvent which can simplify reprocess and precipitate uranium oxide on cathode surface at low temperature, and extremely reduce the corrosion of recovery device. SOLUTION: Nitrate containing uranium nitrate is heated to arrange molten salt 13, the molten salt is electrolyzed by arranging a pair of electrodes to be an anode 17 and a cathode 18 in the molten salt, and uranium oxide 24 is precipitated on the surface of the cathode 18. For the nitrate containing uranium nitrate, mixture of uranium nitrate and one or two kinds of nitrate selected from sodium nitrate, potassium nitrate, calcium nitrate and magnesium nitrate can be raised.</p> |
