核电站冷凝水流量功能验证工具开发及试验研究

Development and Experimental Study of Functional Verification Tool for Condensate Flow in Nuclear Power Plants

核电站泄漏监测系统在预防核电站泄漏方面起着重要作用,因此明确泄漏监测系统冷凝水流量测量机理具有重要意义。为了实现冷凝水流量测量机理研究,开发了一套冷凝水流量模拟验证装置,并将该装置成功应用于核电站冷凝水流量测量功能的试验研究。使用该装置对重力疏排水冷凝水流量测量管线的管道布置、管道疏水情况和冷凝水流量计相关参数设置等方面进行验证。同时,对现有设计、安装和调试环节存在的问题给出改进方案。研究结果表明:管线布置不当会导致管道疏水不畅和重力疏水在流量计处无法建立稳定流量等问题。同样地,冷凝水流量计报警阈值设置不当和小流量参数设置不当也会影响系统流量测量功能。该研究可以为重力疏排水流量测量方面的研究和应用提供参考。

The leakage monitoring system of nuclear power plant plays an important role in preventing leakage in nuclear power plant,so it is of great significance to clarify the condensate flow measurement mechanism of the leakage monitoring system.To realize the condensate flow measurement mechanism study,a condensate flow simulation verification device is developed and successfully used for the experimental study of condensate flow measurement function in nuclear power plants.The device is used to verify the piping arrangement of the gravity evacuation condensate flow measurement pipeline,the piping hydrophobic condition and the relevant parameter settings of the condensate flow meter,etc.At the same time,the existing design,installation and commissioning aspects of the problem to give improvement programs.The results of the study show that improper piping arrangement can lead to poor pipeline hydrophobicity and gravity hydrophobicity at the flowmeter will not be able to establish a stable flow rate and other issues.Similarly,improperly set alarm thresholds for condensate flowmeters and improperly set low-flow parameters can also affect the system’s flow measurement function.The study can provide a reference for the research and application of gravity evacuation flow measurement.