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在对核燃料进行后处理时,对Np在铀产品中的控制要求十分严格,是后处理工艺分析中重点关注的对象之一。由于大量的铀以及少量钚的严重干扰,如何实现大量铀中微量镎的实时监测一直是个难题。本研究将TTA萃取与阴离子交换分离相结合,建立一个针对大量铀中微量镎的快速分离方法。工作中对还原时间、TTA萃取条件、阴离子树脂分离条件进行了系统研究并对流程进行了检验,最终推荐分离流程如下:
In the reprocessing of nuclear fuel, the control of Np in uranium products is very strict, which is one of the focuses of post-treatment process analysis. Due to the large amount of uranium and a small amount of plutonium, it has been a dilemma to realize real-time monitoring of trace amounts of trace amounts of uranium. In this study, TTA extraction and anion exchange separation were combined to establish a rapid separation method for a large amount of trace amounts of uranium. Work on the reduction time, TTA extraction conditions, anionic resin separation conditions were systematically studied and the process was tested, the final recommended separation process is as follows: