“华龙一号”堆芯冷却监测系统设计

Design of Core Cooling Monitoring System in HPR1000

"华龙一号"是我国自主研发的第三代核电站,其反应堆及一回路系统在设计中对固有安全性提出了更高的要求。对于二代加核电厂堆芯冷却监测系统(CCMS),需要在反应堆底部开孔测量水位。该设计降低了反应堆固有安全性,必须重新设计。本文设计了一种新型CCMS,其探测器从压力容器顶盖插入堆芯进行直接测量,不但提高了关键点的水位测量准确度,同时避免了压力容器底部开孔,满足了"华龙一号"反应堆固有安全性要求。

HPR1000 is the third generation NPP, and its reactor and primary loop system need to fulfil higher requirements for inherent safety. For the core cooling monitoring system（CCMS） of the second generation nuclear power plant, the bottom of the reactor shall be bored to measure the water level. This design degrades the inherent safety of the reactor and shall be redesigned. This paper designs a new core cooling monitoring system, in which the water level detector inserted into the core from the pressure vessel cover directly. This design improves the accuracy of measuring the water level of key points and eliminates the boring at the bottom of the reactor, which meets the HPR1000 reactor inherent safety requirements.