Research Article
Assessing the Impact of Common Cause Failures on Site Risk within Level 1 Multi-Unit PSA
Table 5
Major CCF events in the multi-unit SBO event scenarios.
| No | Event | Description | FV | #MCS |
| 1 | AFW-CCF-FS-FW3AB | Common cause failure of AFW motor driven pump | 0.008705 | 8 | 2 | 2-AFW-CCF-FS-FW3AB | Common cause failure of AFW motor driven pump | 0.008705 | 8 | 3 | PPS-CCF-FT-15356 | CCF of PORV blocking valves | 0.008330 | 6 | 4 | 2-PPS-CCF-FT-15356 | CCF of PORV blocking valves | 0.008330 | 6 | 5 | 2-OEP-CCF-FS-DGAB | DG CCF to start | 0.001543 | 3 | 6 | AFW-CCF-LK-STMBD | Undetected Leakage Thro CV27, CF58, or CV89 | 0.068165 | 10 | 7 | 2-AFW-CCF-LK-STMBD | Undetected Leakage Thro CV27, CF58, or CV89 | 0.068165 | 10 |
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