Delayed Station Blackout Event and Nuclear Safety

Table 10

Basic events with the largest FV importance measure, model with 15-minute delay.

Number	Name	Description	Nom. value	FV	RDF	RIF
1	LOOP	Loss of off-site power IE	7,70E − 02	2,35E − 01	1,31E + 00	Infinite
2	S1	Medium LOCA IE	1,00E − 03	2,10E − 01	1,27E + 00	Infinite
3	AFW-XHE-FO-U1SBO	Operator failure to start AFW	8,20E − 02	1,40E − 01	1,15E + 00	2,49E + 00
4	AFW-TDP-FR-2P6HR	AFW failure to run	3,00E − 02	1,32E − 01	1,15E + 00	5,25E + 00
5	R	Manual reactor scram	1,70E − 01	1,31E − 01	1,15E + 00	1,64E + 00
6	ATWS	Anticipated transient WS IE	5,00E − 04	1,31E − 01	1,15E + 00	Infinite
7	HPI-XHE-FO-FDBLD	Operator failure feed/bleed	7,10E − 02	1,30E − 01	1,15E + 00	2,70E + 00
8	V	Interfacing LOCA IE	1,60E − 06	1,05E − 01	1,12E + 00	Infinite
9	T2	Loss of main FW IE	9,40E − 01	9,56E − 02	1,11E + 00	Infinite
10	RECOV-S1-2	Operator recovery action	9,29E − 01	8,51E − 02	1,09E + 00	1,01E + 00