Delayed Station Blackout Event and Nuclear Safety

Table 9

The basic events with the largest FV importance measure in reference model.

Number	Name	Description	Nom. value	FV	RDF	RIF
1	LOOP	Loss of off-site power IE	7,70E − 02	2,45E − 01	1,32E + 00	Infinite
2	S1	Medium LOCA IE	1,00E − 03	2,07E − 01	1,26E + 00	Infinite
3	AFW-XHE-FO-U1SBO	Operator failure to start AFW	8,20E − 02	1,40E − 01	1,15E + 00	2,48E + 00
4	AFW-TDP-FR-2P6HR	AFW failure to run	3,00E − 02	1,31E − 01	1,15E + 00	5,23E + 00
5	R	Manual reactor scram	1,70E − 01	1,29E − 01	1,15E + 00	1,63E + 00
6	ATWS	Anticipated transient WS IE	5,00E − 04	1,29E − 01	1,15E + 00	Infinite
7	HPI-XHE-FO-FDBLD	Operator failure feed/bleed	7,10E − 02	1,28E − 01	1,15E + 00	2,68E + 00
8	V	Interfacing LOCA IE	1,60E − 06	1,03E − 01	1,12E + 00	Infinite
9	T2	Loss of main FW IE	9,40E − 01	9,44E − 02	1,10E + 00	Infinite
10	RECOV-S1-2	Operator recovery action	9,29E − 01	8,40E − 02	1,09E + 00	1,01E + 00