This is a non-emergency notification. In preparation for converting from
10 CFR 50, Appendix R, to
NFPA (National Fire Protection Association) Standard 805, an update to the Brunswick Steam Electric Plant (
BSEP)
Safe Shutdown Analysis has been performed which identified circuit configurations where fire damage, under certain postulated fire scenarios, could impact the ability to safely shut down following a fire, in accordance with
10 CFR 50, Appendix R.
Affected fire areas are CB-23E, RB1-N, RB1-S, RB2-N, RB2-S, TB1, DG-07, and DG-16E. A fire in one of these areas could potentially affect the post fire capability of the following safe shutdown systems: 1) Containment Overpressure Protection, 2) Emergency Bus Load Shed, 3) Control Room HVAC, or 4) Emergency Diesel Generator Building HVAC.
This is reportable as an unanalyzed condition that significantly degrades plant safety in accordance with 10 CFR 50.72(b)(3)(ii)(B).
Fire protection compensatory measures (i.e. roving fire watches) currently exist in the affected fire areas.
This event did not result in any adverse impact to the health and safety of the public. The safety significance is minimal. Fire watches were already ongoing in these areas prior to the time of discovery. The conditions identified here are based on hypothetical fire scenarios that have not actually occurred.
This condition has been entered into the Corrective Action Program (i.e. CR 676576). Previous similar events were reported in NRC Event 47341 and 49222, and in Brunswick LERs 1-2011-002 and 1-2013-002.
The NRC Resident Inspector has been notified.
