滨海非能动核电站厂用水系统优化研究

发布时间：2018-11-08 08:04

【摘要】：在滨海非能动核电站中,对厂用水系统(SWS)的安全性和能用度的要求是比较高的,在取水水位变化幅度较大且运行工况较复杂的情况下,厂用水系统需要长期保持稳定、高效的运行状态。所以,针对厂用水系统进行优化研究对核电站的运行安全有重要意义。本文通过对滨海非能动核电站厂用水系统的系统功能功能、设计基准以及运行工况等进行分析研究,梳理出对该系统长期稳定、高效运行起关键作用的主要工况和运行模式。然后,对水力学理论及相应的水力学计算公式进行评价,确定了适合于管网系统的便捷的流体分析软件AFT对厂用水系统进行辅助设计和优化计算。建立了某滨海非能动核电站厂用水系统的模型,输入了各关键设备的阻力系数,针对不同水位条件及不同工况的系统阻力特性确定了系统管径组合。然后对6种运行组合模式开展水力计算,得到不同配置下的系统流量-阻力特性曲线;再结合对主要运行工况的分析,得出实际运行工况下系统特性曲线的变化区域;最后将系统流量-阻力特性曲线和水泵性能曲线相结合,通过直观的图形显示,将高效运行的概念引入到水泵的选型优化中。最后,通过现场反馈的调试结果,表明厂用水泵能够长期处于高效率区内工作,满足系统长期稳定、高效运行的要求。
[Abstract]:In the coastal non-active nuclear power station, the requirements for the safety and energy availability of the water system (SWS) are relatively high. In the case of large variation of water level and complex operating conditions, the water system of the plant needs to be kept stable for a long time. Efficient running state. Therefore, it is important for the operation safety of nuclear power station to optimize the water system. In this paper, the system function, design datum and operation condition of the water system of coastal inactive nuclear power plant are analyzed and studied, and the main working conditions and operation modes that play a key role in the long-term stability and high efficiency operation of the system are sorted out. Then, the hydraulics theory and the corresponding hydraulic calculation formula are evaluated, and the convenient fluid analysis software AFT, which is suitable for the pipe network system, is determined for the auxiliary design and optimization calculation of the plant water system. The model of water system in a coastal inactive nuclear power plant is established and the resistance coefficient of each key equipment is input. The system pipe diameter combination is determined according to the resistance characteristics of the system under different water level conditions and different working conditions. Then hydraulic calculation is carried out for 6 kinds of combined operation modes to obtain the system flow-resistance characteristic curve under different configurations, and then the variation region of the system characteristic curve under the actual operating condition is obtained by combining the analysis of the main operating conditions. Finally, combining the flow-resistance characteristic curve of the system with the performance curve of the pump, the concept of efficient operation is introduced into the selection and optimization of the pump through the visual graphic display. Finally, through the field feedback test results, it is shown that the plant water pump can work in the high efficiency area for a long time, and meet the requirements of long-term stable and efficient operation of the system.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM623

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