Exelon Generation has announced a series of tests on the sirens around its Peach Bottom Atomic Power Station in southern York County.
The first three-minute test is scheduled for Wednesday at 1 p.m.
Additional tests are set for Wednesday, July 24 and Wednesday, July 31, 2013 - both beginning at 1 p.m. - and on Tuesday, August 6, when six separate tests every 90 minutes will begin at 8 a.m.
Exelon is testing all 97 emergency warning sirens in the 10-mile radius around Peach Bottom, each of which has been upgraded with new units featuring a battery back-up. The testing is required by the Federal Emergency Management Agency.
Peach Bottom has never used the sirens for emergency notification, but they are often used by Pennsylvania and Maryland emergency management authorities to notify residents of severe weather.
The sirens are not a signal to evacuate, but a warning to tune to a local Emergency Alert Broadcast station.