海洋核动力平台一回路摇摆状态下自然循环能力研究

摘要

For structural and operational characteristics of marine nuclear power plat‐form ,a transient analysis model of the primary loop was developed which considered the swing impact of the marine nuclear power platform .According to the results of the code ,the swing state will adversely affect the natural circulation .In case of a 45‐degree swing state ,the natural circulation mass flow rate will drop about 5% .Improving the height of the steam generator above the reactor core and reducing pump resistance can effectively decrease the temperature of the core for natural circulation state and improve the natural circulation mass flow rate .%针对海洋核动力平台的结构和运行特点，建立了一回路流量瞬态分析计算模型，开发了海洋核动力平台自然循环计算程序。该程序可计算核动力平台横向摇摆对自然循环的影响。计算结果显示，摇摆状态将对自然循环产生不利影响，45°横向摇摆将使自然循环流量下降约5％，对于一回路的布置，提高蒸汽发生器的设备高度和减小泵的阻力系数能有效降低自然循环状态下堆芯温度和提高自然循环流量。