核电站最小安全系统电磁脉冲效应试验研究

高空电磁脉冲(HEMP)可通过线缆、孔缝等耦合通道进入电子设备，对各种电子化设备造成暂时甚至永久损伤。考虑到核电站的安全防护等级要求极高，因此有必要研究强电磁脉冲作用下核电站内电子系统的易损性和薄弱环节。首先确定并搭建了核电站最小安全系统模拟试验系统，包括电气、仪控系统和时钟同步系统; 搭建满足GJB 8848-2016规定的威胁级辐照试验平台; 然后对核电站最小安全系统进行辐照效应试验。利用试验数据及效应现象，初步分析了核电站最小安全系统在强电磁脉冲作用下的效应规律，发现HEMP对核电站最小安全系统具有一定程度的威胁，但未影响其核心关键职能。通过总结效应现象、分析薄弱环节和效应阈值，为接下来核电站最小安全系统的易损性评估和防护策略的制定提供依据。

Experiment research on electromagnetic effects of minimum safety system in nuclear power plant

High-altitude electromagnetic pulse (HEMP) can couple into electronic equipment through channels, such as cables and apertures, causing temporary or permanent damage to various electronic systems. Considering the extremely high level of safety protection of nuclear power plants, it is necessary to study the sensibility, vulnerability and protective measures of the electronic systems in nuclear power plants under the radiation of electromagnetic pulses. In this paper, firstly, a minimum safety system of nuclear power plant was determined and built, including electrical, instrumentation, and clock synchronization systems. Then the radiation experimental platform of HEMP was built, and the electrical field waveform of HEMP simulator meets the requirements of GJB 8848-2016 standard. Finally, the electromagnetic pulse radiation experiment was performed on the minimum safety system. Based on the experimental data and effects, a preliminary analysis was performed for the electromagnetic pulse coupling to the minimum safety system of the nuclear power plant, and it is found that HEMP has a certain degree of threat to the minimum safety system of the nuclear power plant, but doesn't affect its core functions. By summarizing the effect phenomena, analyzing sensitive parts and thresholds, this study provides a basis for the following vulnerability assessment and protection strategy formulation.