Assessing the Impact of Common Cause Failures on Site Risk within Level 1 Multi-Unit PSA

Table 3

Major CCF events in the multi-unit LOOP event.

No.	Event	Description	FV	#MCS
1	EPDGW-DGAB	DGs A and B fail to start and load due to CCF	0.022490	6
2	2-EPDGW-DGCD	DGs C and D fail to start and load due to CCF	0.022490	6
3	EPDGW-CCF-DG-A-AAC	Loss of power from DG A and AACDG due to inter-unit CCF	0.000132	2
4	EPDGW-CCF-DG-B-AAC	Loss of power from DG B and AACDG due to inter-unit CCF	0.000132	2
5	EPDGW-CCF-DG-AB-AAC	All DGs fail to start due to inter-unit CCF	0.000132	2
6	2-EPDGW-CCF-DG-C-AAC	Loss of power from DG C and AACDG due to inter-unit CCF	0.000132	2
7	2-EPDGW-CCF-DG-D-AAC	Loss of power from DG D and AACDG due to inter-unit CCF	0.000132	2
8	2-EPDGW-CCF-DG-AB-AAC	Loss of power from DG C and AACDG due to inter-unit CCF	0.000132	2