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Final Accident Sequence Precursor Analysis - River Bend Station, Potential Loss of Safety Function and Condition Prohibited by TS Due to EDG Lube Oil Chiller Leak Caused by Design Deficiency (LER-458-2018-006) - Reject
	ML19046A034
Person / Time
Site:	River Bend
Issue date:	02/11/2019
From:	Christopher Hunter; NRC/RES/DRA/PRB
To:	;
	C. Hunter 415-1394
References
	LER 458-2018-006
	Download: ML19046A034 (11)
	v • d • e

containment ventingoperator fails to vent containment given seismic eventnormal containment venting failsboth containment venting pathways failoperators fail to vent containment via the personnel airlockcontainment venting (SBO)*operators fail to declare ELAP when beneficialoperator fails to restore offsite power following FLEX operation (ELAP)operators fail to stage or run or load or refuel 480V portable FLEX dieseloperator fails to recover emergency diesel in 30 minutesoperator fails to recover emergency diesel in 1 houroperator fails to recover emergency diesel in 4 hour4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months soperator fails to recover emergency diesel in 6 hour6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months soperator fails to recover emergency diesel in 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months soperator fails to recover emergency diesel in 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months soperator fails to recover emergency diesel in 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months operators fail to depressurize the reactor during ELAPoperators fail to align and operate SPCoperators fail to stage or run or supply or refill FLEX RPV pump*containment failure causes loss of high pressure injection

diesel generator A is unavailable because of maintenanceoperator fails to depressurize the reactor (MLOCA-ATWS-SBO)

DG Cis unavailable because of maintenanceSBO diesel is unavailable because of maintenance*

ML19046A034