Science and Technology of Nuclear Installations / 2015 / Article / Tab 12

Research Article

Delayed Station Blackout Event and Nuclear Safety

Table 12

The basic events with largest FV importance measure in SBO event tree, model with 15-minute delay.

NumberNameDescriptionNom. valueFVRDFRIF

1LOOPLoss of off-site power IE7,70E − 021,00E + 00InfiniteInfinite
2NRAC-SGDR ()Off-site power restoration2,65E − 011,00E + 00Infinite3,77E + 00
3SBO-PORV-DMDPrimary system integrity4,50E − 016,98E − 013,31E + 001,85E + 00
4NRAC-PRZBV ()Off-site power restoration1,62E − 016,71E − 013,04E + 004,47E + 00
5RECOV-T1SN-21Operator recovery action9,33E − 016,66E − 012,99E + 001,05E + 00
6BETA-2DGEDG common-cause failure3,80E − 024,38E − 011,78E + 001,21E + 01
7OEP-DGN-FSEDG fails to start2,20E − 024,38E − 011,78E + 002,05E + 01
8OEP-DGN-FS-DGO1EDG #1 fails to start2,20E − 023,78E − 011,60E + 001,76E + 01
9OEP-DGN-FS-DGO4EDG #2 fails to start2,20E − 023,78E − 011,60E + 001,76E + 01
10PPS-SOV-OO-1455RCS PORV fails to reclose3,00E − 023,49E − 011,54E + 001,23E + 01
11PPS-SOV-OO-1456RCS PORV fails to reclose3,00E − 023,49E − 011,54E + 001,23E + 01

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