Accident Analysis of Equipment System Based on the Event Sequence Diagram and Fault Tree

The application of ESD_FT (Event Sequence Diagram and Fault Tree) method in accident analysis of equipment system was discussed in this paper, a new ESD basic event launched by internal fault tree was proposed, and the ESD_FT analysis model of the equipment system coolant loss accident was established. According to the analysis results, it can be concluded that the ESD_FT comprehensive analysis method is very effective and practical for accident analysis.