Three Mile Island testing siren Thursday


Exelon Generation, owner of Three Mile Island Generating Station, will conduct its semi-annual test of the emergency warning sirens surrounding the Londonderry Township facility on Thursday at approximately 12:15 p.m., according to a company press release.

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This is one of two full-volume tests performed each year, according to the release. Three Mile Island's siren system consists of 96 sirens located in parts of Cumberland, Dauphin, Lancaster, Lebanon and York counties within a 10-mile radius of the station.

The sirens are typically meant to alert residents to tune to an Emergency Alert Broadcast Station for more information, but that system will not be activated during the test.