核电厂主蒸汽管道疏水器液位高报警原因分析

Analysis of the Causes of High Liquid Level Alarm in the Steam Trap of the Main Steam Pipeline in Nuclear Power Plant

某核电厂4号机组第9次大修后,主蒸汽系统(VVP)管道疏水器出现液位高报警频繁触发的情况。经调查处理,考虑到该故障模式较为典型,本文对故障分析处理过程进行了总结,明确了故障原因及故障与机组功率之间的关联性,并制定后续改进措施。鉴于群厂VVP管道疏水器出现液位高报警的情况多有发生,该问题的分析结果对后续处理类似问题具有一定的参考意义。After the 9th major overhaul of Unit 4 in a nuclear power plant, the main steam system (VVP) pipeline drain frequently triggered a high liquid level alarm. After investigation and handling, considering that the fault mode is relatively typical, this article summarizes the fault analysis and handling process, clarifies the cause of the fault and the correlation between the fault and the unit power, and formulates subsequent improvement measures. Given the frequent occurrence of high liquid level alarms in the VVP pipeline steam trap of the group factory, the analysis results of this problem have certain reference significance for subsequent handling of similar problems.