Research Article
Assessing the Impact of Common Cause Failures on Site Risk within Level 1 Multi-Unit PSA
Table 8
Major CCF events in the multi-unit LOOP followed by SBO event.
| No. | Event | Description | FV | #MCS |
| 1 | EPDGW-DGAB | DGs A and B fail to start and load due to CCF | 0.022490 | 3 | 2 | 2-EPDGW-DGCD | DGs C and D fail to start and load due to CCF | 0.022490 | 3 | 3 | EPDGW-CCF-DG-A-AAC | Loss of power from DG A and AACDG due to inter-unit CCF | 0.000132 | 1 | 4 | EPDGW-CCF-DG-B-AAC | Loss of power from DG B and AACDG due to inter-unit CCF | 0.000132 | 1 | 5 | EPDGW-CCF-DG-AB-AAC | All DGs fail to start due to inter-unit CCF | 0.000132 | 1 | 6 | 2-EPDGW-CCF-DG-C-AAC | Loss of power from DG C and AACDG due to inter-unit CCF | 0.000132 | 1 | 7 | 2-EPDGW-CCF-DG-D-AAC | Loss of power from DG D and AACDG due to inter-unit CCF | 0.000132 | 1 | 8 | 2-EPDGW-CCF-DG-CD-AAC | Loss of power from DG C and AACDG due to inter-unit CCF | 0.000132 | 1 | 9 | AFW-CCF-LK-STMBD | UNDETECT LKAGETHRU CHK VLV CV27, CF58, or CV89 | 0.000001 | 7 | 10 | 2-AFW-CCF-LK-STMBD | UNDETECT LKAGETHRU CHK VLV CV27, CF58, or CV89 | 0.000001 | 7 |
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