某核电堆型主蒸汽系统汽锤研究
Research on Steam Hammer of Main Steam System in a Nuclear Reactor Type
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摘要:
以某核电堆型核岛主蒸汽系统为研究对象，研究主蒸汽隔离阀快关引起的汽锤现象。采用PIPENET软件进行建模和计算，给出管系中不同管段的最大载荷及出现时间。结果表明关阀瞬间的载荷最大，并且主蒸汽隔离阀后的载荷比隔离阀前的载荷大，主要是因为隔离阀前设置了卸压装置。同时对卸压装置的开启和流量特性进行了模拟。此外，分析了卸压管线的变化以及主蒸汽管道增加支管的情况对汽锤的影响。以上研究结果可应用于系统设计和管道力学应力计算分析，优化管道的布置，对提高主蒸汽系统和电厂的安全性具有重要的意义。 Abstract:Study the steam hammer by fast closing of main steam isolation valve of the nuclear island main steam system in some nuclear power type. Establish the model used "PIPENET" software and calculate the most steam hammer load in different pipes and the appearing time. The results show that the most steam hammer loads appear when closing the valve, the steam hammer load after the main steam isolation valve is larger than the one before the valve because of the relief device set before the valve. Meanwhile the opening and flow of the relief device are simulated. Further, analyse the steam hammer influence by the changing of the relief piping and the branch pipe from the main pipe. All above can be used for system design, stress calculation of pipe, and optimizing piping layout, which has great significance for improving the security of main steam system and nuclear power plants.
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