钠冷快堆中安全棒落棒过程的水力计算

Hydraulic Calculation of Falling Process of Safety Rod in Sodium-cooled Fast Reactor

安全棒及其驱动机构是钠冷快堆中的紧急停堆系统,其落棒时间一直是钠冷快堆安全设计关注的重点之一。本文利用一维水力管网方法对中国实验快堆中的安全棒系统落棒过程开展了详细的建模和分析,得到了安全棒在落棒过程中的位移、速度、加速度与时间的关系,并与中国实验快堆调试试验结果进行了对比。同时,基于该方法开展了中国实验快堆安全棒落棒时间与冷却剂流量及温度的敏感性分析及研究。

Safety rod and its drive mechanism is one of the shutdown systems in sodium-cooled fast reactor.The drop time of safety rod has been one of the focuses of safety design of sodium-cooled fast reactor.In this paper,the one-dimensional hydraulic pipe system method is used to conduct a detailed modeling and analysis of the falling process of the safety rod system in China Experimental Fast Reactor.The relationship between time,displacement,velocity and acceleration is presented and is compared with the experimental test results of China Experimental Fast Reactor.The sensitivity analysis and research on the safety rod dropping time and the coolant flow rate and temperature of China Experimental Fast Reactor are carried out.