摘要
运用调节阀和孔板的阻塞流计算公式,对岭澳核电站二期蒸汽发生器排污系统因为调节阀发生阻塞流导致系统频繁跳闸的问题进行分析。分析表明,调节阀的压力恢复系数FL和孔板的压降对调节阀是否发生阻塞流有重要影响。为避免阀门发生阻塞流,在进行阀门选型时,选择压力恢复系数FL较大的阀门;在满足回路流量要求的情况下,可以在调节阀后安装压降大的孔板,以减少阀门压降并增大阀后压力。
There is an experience feedback that a control valve choked flow problem in the steam generator blowdown system of Ling' ao phase II nuclear power plant resulted in a frequency system trip. The problem is studied by using a method to calculate the choked flow in the control valve and orifice and some practical solutions are suggested to prevent the damage of choked flow. The control valve recovery facter FL and the pressure drop of orifice have a great influence to choked flow. To reduce the damage of choked flow,it is recommended to select a higher recovery facter FL control valve and install an orifice with bigger pressure drop downstream the control valve to decrease the pressure drop of control valve and increase the pressure downstream the control valve.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2013年第S2期93-96,共4页
Nuclear Power Engineering
