面向凝汽器检漏需求的多工质泄漏研究

Various Media Leak Study for Condenser Leak Detection Needs

凝汽器作为核电站重要的冷却设备,其密封性直接关系核电站的安全运行。本文模拟凝汽器真实工况(真空侧7500Pa,压力侧110kPa),基于四极质谱仪搭建了实验系统,研究了不同量级漏孔(氦气等效漏率为10^(-7)~10^(-1)Pa·m^(3)/s)下氦气、空气、SF6三种气体介质的漏率。结果表明,在凝汽器工况下,所研究量级范围内气体介质漏率与介质种类无关,只与标称漏率有关。

As an important cooling equipment of nuclear power plants,the tightness of condenser is directly related to the safe operation of nuclear power plants.In this paper,the real working conditions of the condenser(the vacuum side is 7500Pa,the pressure side is 110kPa)are simulated,an experimental system is built based on quadrupole mass spectrometer,and the leakage rates of three gas media including helium,air and SF6 are studied under different magnitudes of leakage holes(helium equivalent leakage rate is 10^(-7)~10^(-1)Pa·m^(3)/s).The results show that under condenser conditions,the leakage rate of the gas medium within the measured magnitude has nothing to do with the type of medium,but only with the nominal leakage rate.