针对固体核燃料溶解过程中固液共存物料非均匀的特点,在现有铀溶液临界实验装置(YSR)基础上,使用MONK程序进行堆芯物理计算,设计了满足非均匀临界实验要求的实验装置,如图1所示。确定了实验装置的几何结构、料液成分、燃料段的排列方式和整体布置以及临界实验方案,堆芯布置列于表1。根据模拟过程,有质量拐点的出现。按照现在临界实验条件,仅引出了单调变 In view of the non-uniformity of solid-liquid coexisting materials in the process of dissolving solid nuclear fuel, based on the existing uranium solution critical experiment device (YSR), the MONK program is used to calculate the core physics and the experimental device which meets the non-uniform critical experiment requirements is designed. As shown in Figure 1. The geometry of the experimental device, the composition of the feed liquid, the arrangement of the fuel segments, the overall layout and the critical experimental scheme were determined. The core layout is shown in Table 1. According to the simulation process, there is a quality turning point. According to the present critical experimental conditions, only a monotonic change is introduced