Yangjiang Nuclear Power Plant which total installed capacity is 6000 MW in the first phase is the largest nuclear power project in our country.According to the installed capacity of 6000 MW,the current which flows through the grounding device will reach 34.18 kA when the grounding short circuit occurs outside the switching station.The soil resistivity in this power plant is up to 1800 Ω·m.The amplitude of grounding impedance will reach 0.819 Ω and the touch voltage will be forth the sizes of the requirement of ground rule without taking measures to reduce impedance.In order to reduce the grounding impedance to a acceptable level,analysis method and boundary element method are used to research the using of under-seawater grounding network to reduce the grounding impedance.The result indicates that analysis method and boundary element has a different result with each other and under-seawater grounding network can greatly reduce the grounding impedance.

实验分析了大亚湾核电站警报系统存在的防雷问题(特别是警报系统误动作)的原因并提出了采用延时装置有效地抑制雷电干扰的新方法.

导体消雷器运行状况的调查表明:经过1238套.a的运行考验,伞型导体消雷器本体及其被保护物未遭受直击雷;经过3200套.a的运行考验,线路型导体消雷器仅有11基.次雷击跳闸事故.分析比较了导体消雷器与避雷针的防雷效果,导体消雷器明显优于避雷针.