Analysis and Solution of Spike Current of Intermediate Range for Nuclear Instrumentation System
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摘要: 红沿河核电厂1号机组首次启动过程中,核仪表系统(RPN)中间量程通道闪发异常电流导致反应堆停堆。通过对中间量程通道工作原理分析和现场故障排查,并进行模拟实验,确定故障根源为中间量程通道的量程切换处理过程存在缺陷,制定并实施了基于参数优化的解决方案。Abstract: During the initial start-up of HYH NPP unit 1, spike currents occurred in intermediate range channel of RPN system and reactor trip was triggered. After analyzing the operation principle of intermediate range channel and site inspection, and doing simulating test, the root cause was fixed on the bug of range switching of intermediate range channel. Then a solution based on parameters optimizing was made and executed on site.
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Key words:
- Intermediate range /
- Range switching /
- Spike currents
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