SWITCHGEAR ROOM DEGRADED FLOOD SEALS

“On 3/23/13 it was identified that a conduit flood seal between an outside manhole and the switchgear rooms is displaced. This degraded flood seal compromises the flooding design of both the East and West Switchgear Rooms. “Compensatory measures were implemented for the flood seal in accordance with the plants barrier control process. Repairs of the seal are in progress.” Per the licensee these switchgear rooms contain both normal and safety related 4kV and 480 V electrical boards. Compensatory measures implemented include: Plant Maintenance personnel will take actions to seal any leak within 24 hours of a flooding event and also provide sump pumps to remove any water that has leaked in. The licensee notified the NRC Resident Inspector and the Vermont State Liaison.”

http://www.nrc.gov/reading-rm/doc-collections/event-status/event/en.html#en48847