Science and Technology of Nuclear Installations / 2015 / Article / Tab 11

Research Article

Delayed Station Blackout Event and Nuclear Safety

Table 11

Basic events with the largest FV importance measure in SBO event tree.

NumberNameDescriptionNom. valueFVRDFRIF

1LOOPLoss of off-site power IE7,70E − 021,00E + 00InfiniteInfinite
2NRAC-SGDROff-site power restoration4,74E − 011,00E + 00Infinite2,11E + 00
3SBO-PORV-DMDPrimary system integrity4,50E − 017,02E − 013,36E + 001,86E + 00
4NRAC-PRZBVOff-site power restoration1,67E − 016,76E − 013,09E + 004,37E + 00
5RECOV-T1SN-21Operator recovery action9,33E − 016,71E − 013,04E + 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-1456RCS PORV fails to reclose3,00E − 023,51E − 011,54E + 001,24E + 01
11PPS-SOV-OO-1455RCS PORV fails to reclose3,00E − 023,51E − 011,54E + 001,24E + 01

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