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Np是后处理工艺分析中重点关注的对象之一,而目前中试厂Np的分析方法由于分析时间长、~(239)Pu等杂质核素干扰大等原因,难以满足工艺分析的需要。为了能够实时监测各工艺过程中镎的含量,保障后处理铀产品的品质,本研究进行了大量铀中微量镎的快速自动分离技术研究。基于液闪测量的要求,建立了TTA萃取-阴离子交换分离纯化镎的流程。全流程对镎的收率大于90%,对U、Pu及Sr、Tc等裂变产物的去污因子
Np is one of the most important objects in the aftertreatment process analysis. However, due to the long analysis time and the large interference of ~ (239) Pu and other nuclides, the Np analysis method of the pilot plant is difficult to meet the needs of process analysis. In order to be able to monitor the contents of 镎 in various processes in real time and ensure the quality of the uranium products after the reprocessing, a large number of rapid automatic separation technologies of trace 镎 in uranium were studied in this study. Based on the requirements of liquid-flash measurement, a procedure of TTA extraction-anion exchange separation and purification was established. The whole process of 镎 yield greater than 90%, on the U, Pu and Sr, Tc and other fission products decontamination factor