Three Mile Island, in cooperation with the counties around the plant, will conduct a test of its new, upgraded emergency notification siren system on Thursday, August 29 at 12:15 p.m. (EDT). The test is part of the process of qualifying the new, upgraded system for service. The original siren system will remain in service until all future testing of the new system is completed.
During the test, all 96 sirens that are part of the new system will be sounded for 3 minutes. Exelon is conducting the tests in cooperation with Cumberland, Dauphin, Lancaster, Lebanon and York Counties and the Pennsylvania Emergency Management Agency (PEMA).
The new system includes battery backup capability that allows the sirens to sound even during power outages.
The purpose of the sirens is to notify residents to tune into an Emergency Alert System (EAS) radio or television station in case of an emergency.