TRPO流程碳酸肼反萃U、Np、Pu工艺研究  

Technology on Re-extraction of U,Np and Pu by Hydrazine Carbonate in TRPO Process

作　　者：刘学刚[1] 肖学文[1] 梁俊福[1] 徐景明[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京102201

出　　处：《原子能科学技术》2005年第5期399-403,共5页Atomic Energy Science and Technology

摘　　要：以水合联氨和二氧化碳为原料合成了碳酸肼,并研究了碳酸肼用于反萃TRPO中负载的U、Np、Pu的工艺条件。探讨了反萃平衡时间、碳酸肼和有机相中负载U浓度对反萃率的影响。使用模拟动力堆燃料后处理高放废液的串级实验结果表明,100 g/L碳酸肼三级逆流反萃对TRPO有机相负载的U、Pu反萃率在99%以上,反萃过程无沉淀和界面污物生成。反萃液经浓硝酸处理后加热可使溶液中的肼完全分解,实现无盐化反萃。Hydrazine carbonate was synthesized with carbon dioxide and hydrazine hydrate. The technological conditions of re-extraction of U, Pu and Np loaded in 30%TRPO/OK by hydrazine carbonate were studied. The effects of equilibrium time, hydrazine carbonate concentration and loading U concentration in organic phase on reextraction rate were investigated. The countercurrent tube experiments using simulated high-level liquid waste from power reactor fuel reprocess were carried out. The results show that the re-extraction rates of U and Pu are above 99% by 100 g/L hydrazine carbonate solution in 3-stage countercurrent experiments. No precipitation or interface filth occurs during re-extraction process. By adding HNO3 to the re-extracted aqueous solution and heating up, the hydrazine can be decomposed completely and the re-extraction process becomes salt free.

关 键 词：TRPO流程 反萃 碳酸肼 

分 类 号：O614.62[理学—无机化学] O614.352[理学—化学]