草酸体系中镎、钚的阴离子交换分离  

Anion Exchange Separation of Np and Pu in Oxalic Acid System

作　　者：梁俊福[1] 康君波[1] 

机构地区：[1]清华大学核能技术设计研究院,北京102201

出　　处：《原子能科学技术》2001年第B05期27-33,共7页Atomic Energy Science and Technology

摘　　要：用阴离子交换法研究了TRPO流程中镎和钚的浓缩和分离。在适宜条件下 ,Np、Pu以草酸络阴离子被阴离子交换树脂吸附。用稀硝酸将镎、钚同时洗脱后 ,调节洗脱液为 8mol/LHNO3,使镎和钚转成硝酸络阴离子 ,再用一阴离子交换柱吸附镎和钚后 ,用氨基磺酸亚铁 硝酸溶液还原解吸钚 ,最后用稀硝酸洗脱镎。在实验基础上 ,建立了镎、钚的离子交换分离流程。本流程的镎、钚浓缩倍数为 84 0 ,它们的浓度达到约 2 0 g/L ,镎和钚的分离系数 βPu/Np>10 0 ;βNp/Pu>30 0 ;Np和Pu的回收率分别为 97 6%和 97 4 %。The concentration and separation of Np and Pu in TRPO process are studied by anion exchange method. Oxalic complex ions of Np and Pu in suitable H 2C 2O 4 HNO 3 solution are absorbed by an anion exchange column, then they are eluted by 0 35 mol/L HNO 3. The eluated solution is adjusted to 8 mol/L HNO 3 and is absorbed as nitrate complex by another anion exchange column. Pu and Np on the column are eluted by 5.6 mol/L HNO 3 0.05 mol/L Fe(NH 2SO 3) 2 and 0 35 mol/L HNO 3, respectively. The concentration and separation process of Np and Pu are given out. Np and Pu are concentrated 840 times in the process, separation coefficient is β Pu/Np >100 and β Np/Pu >300, recovery of Np and Pu is 97.6 % and 97.4 %, respectively.

关 键 词：草酸 镎 钚 阴离子交换 分离 高效废液处理 TRPO流程 乏燃料后处理 

分 类 号：TL241[核科学技术—核燃料循环与材料] TL941.1