The purpose of this work was to guide the design of the suspended control rod in a sodium-cooled fast reactor. Retaining the dimensions and main flow characteristics of the prototype device, a hydraulic model of the passive shutdown device was designed. An experiment was carried out on the critical flow of the upper working position and the lower position (accident condition). The critical flow rate maintaining a stable suspension in the upper working position and hydraulic self-tightening in the lower working position was determined. The study found that the critical flow of the control rod in the lower working position was obviously affected by the circumferential angle; the force that causes the control rod to incline was inevitable and the key position that affects critical working conditions was pointed out. The study also found that the working fluid temperature had little impact on the critical working conditions.

这项工作的目的是指导钠冷快堆中悬浮控制棒的设计。为了保留原型设备的尺寸和主流特性，设计了被动关闭设备的液压模型。对上部工作位置和下部位置的临界流量（事故情况）进行了实验。确定了在上工作位置保持稳定悬挂并在下工作位置保持液压自紧的临界流量。研究发现，在较低工作位置，控制杆的临界流量明显受到圆周角的影响。指出了导致控制杆倾斜的力是不可避免的，并指出了影响关键工作条件的关键位置。