混合式K边界密度计在乏燃料后处理热试验中的应用

Application of Hybrid K-edge/XRF Densitometer in Spent Fuel Reprocessing Active Test

混合式K边界密度计(HKED)主要用于乏燃料后处理原始料液中U和Pu的浓度分析。本文对HKED的结构组成和特点进行了介绍,根据设施条件和测量对象的特点进行了参数优化及系统校准,将其应用于动力堆乏燃料元件先进无盐二循环Purex工艺流程热试验。结果表明,该装置对1AF料液中U浓度分析的精确度达0.3%。

Hybrid K-edge/XRF densitometer （HKED） is widely used for concentration simultaneous analyses of uranium and plutonium in spent fuel dissolution. HKED hard- ware structure and its characteristics were introduced in this paper. Depending on the site＇s condition and object＇s characteristic, the parameters were optimized, and the sys- tem was calibrated. HKED was applied in the advanced Purex process based on salt-free regent active test. It is validated that the uranium concentration precision for 1AF sam- pies is up to 0.3%.