On 8/26/2015 at 1215 [EDT], a review of the Salem Appendix R
Safe Shutdown Analysis in response to the Byron
Event Notification #51334 and Braidwood
Event Notification #51335, identified a fire scenario that could cause spurious operation of the pressurizer power operated relief valves (
PORVs) (PR1 and PR2) and also prevent the ability to close the
PORV block valves (PR6 and PR7) until
AC power is restored to close the block valves. This scenario would result in the loss of
reactor coolant system (
RCS) inventory and pressure control that is not accounted for in
safe shutdown analysis. The above fire scenario is applicable to a fire in the Control Room and Relay Room fire areas.
Hourly fire watches of the Relay Room have been implemented. In addition, the Control Room is continuously staffed by the Operating Shift. In addition, the Relay Room is equipped with automatic detection and suppression.
This event is being reported under 10CFR50.72(b)(3)(ii)(B), for 'any event or condition that results in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety.'
The NRC Resident Inspector has been notified.
The licensee will be notifying the Lower Alloways Township, the State of
New Jersey and the State of Delaware.
