【作者】 卢向晖； 张吉胜； 罗汉炎； 张小英；

【Author】 LU Xiang-hui;ZHANG Ji-sheng;LUO Han-yan;ZHANG Xiao-ying;China Nuclear Power Technology Research Institute;School of Electricity,South China University of Technology;

【机构】 中科华核电技术研究院有限公司； 华南理工大学电力学院；

【摘要】 为进一步理解适用于国内二代加百万千瓦级压水堆核电厂的二次侧非能动余热排出(SPRHR)系统的启动特性,采用RELAP5程序对SPRHR系统进行建模,针对SPRHR系统在启动过程中的响应以及可能发生的汽锤现象进行了研究。结果显示,在合适的时间步长和空间步长下RELAP5程序的计算结果反映出汽锤现象,在不同的启动策略下SPRHR系统响应存在明显差异。分析表明,选择恰当的启动方式和启动速度可有效弱化甚至消除系统启动时的汽锤冲击,提高系统启动稳定性。更多还原

【Abstract】 In order to better understand the startup characteristics of secondary passive residual heat removal(SPRHR)system specifically for the second generation+1 000 MWe PWR nuclear power plant in China,a study was done on startup response of the system and potential steam hammer.The results show that with appropriate time step and mesh length,RELAP5 is able to model the steam hammer which occurs within SPRHR system.Different startup strategies lead to significant differences on the system’s response.This study suggests with appropriate startup procedure and startup speed,the steam hammer could be effectively weakened or even eliminated,and the startup stability of the system could be greatly improved.更多还原