Study on Opportunity Maintenance Strategy of Equipment outside Nuclear Island Based on Operational Availability

Considering the characteristics of that the failure downtime of nuclear power plant will lead great economic loss and that the partial equipment outside the nuclear island can be maintained parallelly,the opportunity maintenance strategy for equipment outside the nuclear island is studied.An opportunity maintenance control strategy is put forward based on the optimal maintenance interval of equipment itself.The simulation algorithm for solving optimal maintenance interval and opportunity maintenance coefficient is offered using Monte Carlo simulation method with maximal operational availability during given time interval.The validity of the opportunity maintenance strategy for advancing system operational availability is proved by an example.