Carrying out online maintenance to reduce the maintenance items during outage is an important means to optimize the outage duration and improve the unit economy.In foreign countries,real-time configuration risk calculation tools have been used to calculate Risk Informed Completion Time(RICT),and online maintenance has been achieved through this tool.In this paper,the feasibility of online maintenance of HPR1000 is demonstrated by the risk-informed method without using real-time risk calculation tools.The research shows that in order to carry out on-line maintenance,it is necessary to permanently adjust the frontstop completion time(FSCT)of one safety system train inoperable from 3 days to 7 days.Thanks to the overall design balance and optimization of HPR1000,the importance of single equipment decreases,and the risk increment caused by this change is limited compared with the risk threshold.After perfecting and applying the real-time configuration risk calculation tool in the future,the flexibility of online maintenance scheme can be improved,and the maintenance period can be further extended to reduce the schedule pressure of maintenance.
维普
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