During the performance of a focused area self assessment (
FASA) for the Clinton Power Station
Fire Protection Program, the
FASA team identified a noncompliance with the
Safe Shutdown Analysis for a fire outside the Diesel Generator (
DG) rooms (i.e., Fire Zone CB-1e, CB-1f, CB-2 and CB-4). The
CO2 panels for each
DG train are all located in the same area outside the
DG engine bay rooms (i.e., 737' Control Building) and a fire in this area could cause fire damage to all three
CO2 panels and/or wiring such that a trip (short) could be initiated to all three
DG Ventilation (VD) fans. Loss of the VD fans (1VD01CA, B and C) results in loss of cooling in the
DG rooms and ultimately loss of the diesels. This constitutes an
Unanalyzed Condition that Significantly Affects Plant Safety.
Compensatory measures are in-place that will allow these VD trips to be overridden and the VD fans to be restarted from the Main Control Room.
The NRC Resident Inspector has been notified.
