Peach Bottom: Sirens Unavailable due to Inclement Weather

Event Number: 46269 Event Date: 09/22/2010 Emergency Class: NON EMERGENCY SIRENS UNAVAILABLE DUE TO INCLEMENT WEATHER "During a thunder storm that extended across southern Pennsylvania and northern Maryland, 21 emergency sirens lost power in York County Pennsylvania and 8 emergency sirens lost power in Harford County Maryland. Exelon is communicating to the appropriate utilities to make emergent repairs to restore these sirens." In accordance with Peach Bottom plant specific procedures because greater than 25% of sirens were unavailable, the licensee contacted the following: Pennsylvania and Maryland Emergency Management; Harford and Cecil counties in Maryland and Lancaster, Chester and York counties in Pennsylvania. The licensee notified the NRC Resident Inspector.