红外在线监测与分析方法在铀氟化挥发工艺中的应用  

Application of infrared spectrometer on-line monitoring and analyzing method in uranium fluoride volatility process

作　　者：牛永生[1] 孙理鑫[1] 胡聪伟[1] 张焕琦[1] 窦强[1] 吴国忠[1] 李晴暖[1] 

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800

出　　处：《核技术》2014年第11期50-55,共6页Nuclear Techniques

基　　金：中国科学院战略性先导科技专项(No.XDA 01020304)资助

摘　　要：高温氟化挥发技术是分离回收乏燃料中易裂变材料铀的干法分离技术。本研究建立了基于红外光谱技术的高温氟化挥发工艺中气相产物在线检测的技术。利用此技术发现在UF4氟化挥发反应过程中,除了UF6之外,还有Mo F6、UO2F2和HF的生成。根据这些产物相对浓度随反应进程的变化,讨论了它们可能的来源。实验工作表明红外光谱技术不仅能够用于高温氟化挥发工艺中氟化反应过程的在线监测和研究,而且可以通过装置结构材料腐蚀产物Mo F6、UF6水解产物UO2F2和HF的在线检测进一步优化工艺流程。Background：High temperature fluoride volatility process（HFVP） is an important pyroprocessing method for separating and recovering fissile material uranium from the spent fuel.Purpose：The goal of this work is to establish an on-line measurement technique for gaseous products.Methods：We established this technique based on infrared spectrometer in HFVP.Results：It was found that during the UF4 fluoride volatility reaction process,in addition to UF6,there were Mo F6,UO2F2 and HF formation.The possible source of those compounds was analyzed according to their concentrations during the reaction process.Conclusion：The results in HFVP showed that infrared spectroscopy may be expected to be used not only for on-line monitoring of the process,but also for optimizing the process through on-line detecting Mo F6 from corrosion of structure material and UO2F2 and HF from hydrolysis of UF6.

关 键 词：干法后处理 铀氟化挥发 红外 在线监测与分析 

分 类 号：TL244[核科学技术—核燃料循环与材料]