氨基羟基脲应用于钚净化浓缩循环  

Application of Hydroxysemicarbazide to Plutonium Purification Cycle

作　　者：杨贺[1] 肖松涛[1] 刘协春[1] 丛海峰[1] 兰天[1] 欧阳应根[1] 王玲钰 YANG He;XIAO Song-tao;LIU Xie-chun;CONG Hai-feng;LAN Tian;OUYANG Ying-gen;WANG Ling-yu(China Institute of Atomic Energy,P.O.Box 275(26),Beijing 102413,China)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2020年第5期325-329,I0002,共6页Journal of Nuclear and Radiochemistry

摘　　要：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)=3.7×10^5。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。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 3.7×10^5.As a stripping reductant,HSC can effectively achieve the plutonium purification cycle and has application prospect in the plutonium purification cycle in APOR process.

关 键 词：氨基羟基脲 还原反萃 钚净化浓缩循环 Pu(Ⅳ) 

分 类 号：TL241[核科学技术—核燃料循环与材料]