During the electrometallurgical pyroprocessing of used metallic nuclear fuel, the chopper operation cuts the fuel element into segments and distributes these segments between the anode basket and plenum can. This paper discusses a method of systematically assessing the mass balance of partitioned materials between the anode basket and plenum can. The proposed method fully accommodates the mass closeout measurements from the chopper operation and automates the assessment of chopper-induced material partitioning. With a set of reasonable assumptions, the proposed approach allows a formal uncertainty analysis on the partitioned masses as well. An illustrative calculation example adopted from the ongoing fissium fuel processing campaign is given.

在对用过的金属核燃料进行电冶金热解期间，斩波器操作将燃料元件切成段，并将这些段分配在阳极篮和增压罐之间。本文讨论了一种系统地评估阳极篮和充气罐之间的分隔物料质量平衡的方法。所提出的方法完全适应了斩波器操作中的质量封闭测量，并自动评估了斩波器引起的物料分配。借助一组合理的假设，所提出的方法还可以对分区的质量进行正式的不确定性分析。给出了正在进行的fi燃料加工活动中采用的说明性计算示例。