余热排出系统是用于冷停堆时排出堆芯余热的系统，亦称停堆冷却系统， 一回路辅助系统之一。在很多核电厂中，该系统还兼作安全注射系统的低压注射子系统。
采用自然循环的余热排出系统是一种被动安全的系统。
The residual heat removal system with natural circulation is a passive safety system.
微流量启动使余热排出系统参数波动变大，达到稳定过程的时间变长。
The small flow rate start-up mode results in system fluctuations that increase with time until a stable process is reached.
非能动余热排出系统是模块式高温气冷堆(MHTR)实现固有安全性的重要保证。
Passive residual heat removal system is the key assurance for the inherent safety of modular high-temperature gas-cooled reactor (MHTR).
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