某核电堆型蒸汽发生器排污系统设计改进
Design Improvement of Steam Generator Blowdown System
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摘要:
根据全范围事故分析结果，在发生蒸汽发生器传热管破裂(SGTR)事故中，为使发生故障的蒸汽发生器水位不会上升太快，需通过蒸汽发生器排污系统排污管线来控制故障蒸发器的水位和压力。通过对蒸汽发生器排污系统进行设计改进，提高系统的设计标准，将破损蒸汽发生器内漏液排向内置换料水箱，使破损蒸汽发生器降压，同时限制破损蒸汽发生器水位，防止破损蒸汽发生器满溢，满足蒸汽发生器排污系统在设计基准事故工况下承担安全功能的要求。改进后的蒸汽发生器排污系统满足国内三代核电技术的要求，为国内三代核电的安全性提供理论依据。 Abstract:According to the results of the full range of accident analysis, in case of steam generator tube rupture, in order to make affected SG water level will not rise too fast, and need to control the affected SG water level and pressure by steam generator blowdown system. According to design improvement of steam generator blowdown system, increase the system design bases, the blowdowns are routed to the IRWST inside the containment, in order to depressurize affected SG pressure and control affected SG level, to prevent the affected steam generator is filled with water, meet the requirements of steam generator blowdown system in the design basis accident under the safety function. The improvement design can satisfy the third generation nuclear power technology, provide theoretical basis for the safety of the third generation nuclear power in China.
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