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自然循环被广泛应用于非能动固有安全性的先进反应堆设计中。实际中,自然循环系统往往是多通道的,且各通道的热流密度也不相同,系统易产生流动不稳定现象,影响系统的安全运行。以RELAP5为分析工具,针对自然循环系统建模并对相关规律作了分析,得出系统在给定参数下的不稳定边界。
Natural circulation is widely used in advanced reactor designs that are inherently insensitive to safety. In practice, the natural circulation system is often multi-channel, and the heat flux density of each channel is not the same, the system is prone to instability of flow, affecting the safe operation of the system. Taking RELAP5 as the analysis tool, the natural circulation system was modeled and the related laws were analyzed. The unstable boundary of the system under given parameters was obtained.