镎与裂片元素分离工艺研究  

Study on the Separation Process of Neptunium and Fission Products

作　　者：李峰峰[1] 陈延鑫[1] 何辉[1] 叶国安[1] 蒋德祥[1] 李斌[1] 唐洪彬[1] 于婷[1] 刘金平[1] Li Fengfeng;Chen Yanxin;He Hui;Ye Guoan;Jiang Dexiang;Li Bin;Tang Hongbin;Yu Ting;Liu Jinping(China Institute of Atomic Energy,the Department of Radiochemistry,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：《广东化工》2023年第15期55-58,共4页Guangdong Chemical Industry

摘　　要：本文设计并验证了镎与裂片元素分离的工艺。所设计的镎提取纯化工艺分为两个工艺段,镎提取与纯化工艺段(2NA)和镎反萃工艺段(2NB)。2NA萃取槽工艺:实现镎钚的共同萃取,镎浓缩3倍,同时与裂片元素进行分离;设计工艺条件下,在2NA工艺段,Np收率大于99.9%,2NA段对Tc的净化为4.0×10^(4),2NA段对Ru的净化为2.1×10^(3),2NA段对Zr的净化为4.0×10^(4);2NB反萃取槽:将镎反萃进入水相。在2NB工艺段,Np反萃率大于99.9%,Np与裂片没有净化效果。验证了提取工艺对高浓度镎提取的可行性。结合之前工作,基本可以确定设计的流程可以实现用萃取法从中放废液中纯化和浓缩镎的目的。In this paper,the separation process of neptunium and splinter elements is designed and verified.The neptunium extraction and purification process is divided into two stages,neptunium extraction and purification process(2NA)and neptunium reverse extraction process(2NB).2NA extraction tank process:neptunium plutonium co-extraction,neptunium concentration 3 times,at the same time separated from the fragment element;Under the design conditions,in the 2NA process,the Np yield is greater than 99.9%,the purification of Ru in the 2NA process is 2.1×10^(3),and the purification of Zr in the 2NA process is 4.0×10^(4).2NB back extraction tank:back extraction of neptunium into the water phase.In the 2NB process,the Np extraction rate is greater than 99.9%,and there is no purification effect between Np and fragment.The feasibility of the extraction process for high concentration neptunium extraction was verified.Combined with the previous work,it is basically confirmed that the designed process can achieve the purpose of purifying and concentrating neptunium from the waste liquid from the effluent by extraction.

关 键 词：镎 溶剂萃取 裂片元素 净化 工艺 

分 类 号：TQ[化学工程]