To selectively separate and recover only uranium from spent nuclear fuel while having nuclear proliferation resistance and environmental affinity of minimizing the quantity of generated waste.
A recovery method includes the uranium dissolution-leaching stage of dissolving only uranium with hydrogen peroxide having the oxidizability between the oxidation-reduction equilibrium voltage of uranium oxide and the oxidation-reduction equilibrium voltage of plutonium oxide, neptunium oxide and americium oxide in a dissolver for a carbonate solution, the stage of precipitating and separating Cs and Tc with an organic precipitant, a uranium- precipitation and carbonate-recovery stage of precipitating uranium in a form of UO oxide, absorbing a generated carbon dioxide gas and allowing carbonate to recycle it by adjusting the carbonate solution containing the uranium to pH 2-4 with an acid in a uranium precipitation tank and the stage of recovering the acid and the alkali solution used in the uranium-precipitation and carbonate-recovery stage while removing metallic ions, impurities remaining in a solution from which the uranium and the carbonate are extracted.
| WO/2011/144937 | NOVEL REPROCESSING METHOD |
LEE EIL HEE
CHUNG DONG YOUNG
YANG HAN BUM
LIM JAE KWAN
CHO KEE SOO
SONG KEE CHAN
SONG KYU SEOK
JEE KWANG YONG
| JPH10332880A | 1998-12-18 | |||
| JPS5669227A | 1981-06-10 |
| US4320923A | 1982-03-23 |
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