In order to meet the requirements of rapid accurate fault location and comprehensive reliable risk analysis of instrument and control system in nuclear power plant, a fault risk analysis method of instrument and control system based on automatic analysis model is proposed. Firstly, the traditional system embedded self-diagnostic analysis, FMEA and automatic analysis of logic signals are integrated to build an automatic risk analysis model. Then, an automatic analysis fusion platform for fault risk is developed based on the automatic risk analysis model. Finally, the effectiveness of the proposed method is verified by example analysis. Practice shows that this method can effectively improve the efficiency of accurate fault location, reduce the fault risk analysis time, and reduce the risk of human error. © 2024 Atomic Energy Press. All rights reserved.
