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Safety system grade apparatus and method for detecting a dropped control rod and malfunctioning exit thermocouples in a pressurized water reactor
Safety system grade apparatus and method for detecting a dropped control rod and malfunctioning exit thermocouples in a pressurized water reactor
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机译:用于检测压水反应堆中控制棒掉落和出口热电偶故障的安全系统级设备和方法
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摘要
A safety system grade dropped rod detection system for a pressurized water reactor (PWR) utilizes core exit thermocouples arranged in multiple trains and hot and cold leg RTDs to generate a safety system grade rod stop signal. The system generates from the temperature signals a relative power deviation (RD) and a curvature index (CI), which is the spatial second derivative of RD for each fuel assembly. The CI signatures not only provide rapid, reliable detection of dropped control rods, but also clearly identify failed and failing thermocouples.
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