氨基羟基脲应用于钚净化浓缩循环

进行了氨基羟基脲(HSC)的硝酸水溶液对30%(体积分数,下同)磷酸三丁酯(TBP)/煤油中高浓度四价钚(Pu(Ⅳ))的还原反萃行为研究,并采用试管串级实验对HSC在钚净化浓缩循环中反萃段工艺进行了验证。结果表明:HSC能有效地实现有机相中高浓Pu(Ⅳ)的反萃;采用13级逆流反萃试管串级实验(还原反萃段10级,补充萃取段3级),对PUREX流程钚净化浓缩反萃段工艺进行了验证,在相比(2BF∶2BX∶2BS)为1∶0.25∶0.15的条件下,Pu的收率为99.99%;钚中去铀的分离因子SF(U/Pu)=3.7×10⁵。HSC作为还原反萃剂,可以实现30%TBP/煤油中高浓度Pu(Ⅳ)的有效反萃,在钚净化浓缩循环工艺中有良好的应用前景。

Application of Hydroxysemicarbazide to Plutonium Purification Cycle

The reduction stripping behavior of high content Pu(Ⅳ) from 30%TBP/OK with HSC was investigated, and the purification efficiency of HSC for plutonium purification cycle in PUREX process was studied. The results show that HSC can effectively realize the purification of Pu. Bench-scale experiment was carried out to simulate 2B unit of PUREX, with the condition of 3 stages for supplemental extraction and 10 stages for stripping, and the flow rate ratio of 2BF∶2BX∶2BS for 1∶0.25∶0.15. The good result is achieved with the yield of more than 99.99% for Pu and the purification coefficient of uranium from plutonium(SF(U/Pu)) is 3.7×10⁵. As a stripping reductant, HSC can effectively achieve the plutonium purification cycle and has application prospect in the plutonium purification cycle in APOR process.