干法后处理流程中电解精炼设备研发进展

Progress and Development of Electrorefiner in Dry Reprocessing Process

高燃耗快堆乏燃料具有高钚含量、强放射性、高释热率等特点。基于溶剂萃取原理的水法后处理工艺存在溶剂易辐解等问题,宜对高燃耗快堆乏燃料采用干法后处理工艺进行处理。熔盐电解干法工艺采用耐辐照的无机盐为介质,通过电化学方法分离回收锕系元素,是最具应用前景的干法后处理技术。在熔盐电解干法工艺流程中,承担锕系元素分离任务的电解精炼单元是核心环节。本文调研了乏燃料干法后处理过程中电解精炼设备的研发进展,分析了电解精炼设备关键技术和发展趋势,为我国快堆乏燃料电解精炼设备的研发提供了参考。

Fast reactor spent fuel with high burnup has the characteristics of high plutonium content,high radioactivity and high heat release rate.The aqueous reprocessing based on solvent extraction principle has the problem of solvent radiolysis.It is better to adopt the dry reprocessing.Dry reprocessing based molten salt electrolysis using irradiation-resistant inorganic salts as media,through electrochemical separation and recovery of actinide,is the most promising dry reprocessing technology.In the process of molten salt electrolytic dry reprocessing,the electrorefining unit is the core link which is responsible for the actinide separation.In this paper,the research and development progress of electrorefiner in the dry reprocessing of spent fuel is investigated,and the key technologies and development trend of electrorefiner are analyzed,which provides a reference for the research and development of fast reactor spent fuel reprocessing in China.