Research on Fault Diagnosis of Primary System Based on MFM and SDG

Reactor primary circuit system is a complex dynamic system with variable parameter coupling, and the operation safety problem is prominent. In order to reduce operation risk, an intelligent fault diagnosis model based on multi-layer flow model (MFM) and signed directed graph (SDG) is established. MFM is used to abstract and split the primary system, and SDG is used for logical reasoning to judge potential faults. Simulation results show that the intelligent diagnosis model can effectively diagnose faults and provide fault propagation path.