Abstract:
AP1000 Emergency Operation Procedures(EOP) are based on the observed symptoms to recover the safety functions.Performing EOP procedures in time can reduce the severe accident risk as much as possible.However,the EOP entry interfaces are complex,and not limited to setpoints in the protection and safety monitoring system.Analyzing all EOP entry interfaces in AP1000 EOP procedures is very helpful for operators to understand the criteria of safety shutdown and engineered safety features(ESF) actuation,and at same time,it is also helpful for the optimization of EOP procedures.