Exelon to test emergency system for 10-mile radius of nuclear plant

A Monday, May 22, 2017, file photo shows cooling towers at the Three Mile Island nuclear power plant in Middletown, Pennsylvania. Exelon Corp., the owner of Three Mile Island, site of the United States' worst commercial nuclear power accident, said Monday, May 29, 2017, it will shut down the plant in 2019 unless it receives a financial rescue from Pennsylvania. (AP Photo/Matt Rourke, File)

Exelon Generation will be testing its emergency warning sirens for areas within a 10-mile radius of Three Mile Island on Thursday, June 7.

The semi-annual full volume test will be conducted at about 12:15 p.m. and sound for three minutes.

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Its purpose is to warn residents living near the nuclear generating station in the event of an emergency.

Hearing one of the 96 sirens located in parts of Cumberland, Dauphin, Lancaster, Lebanon and York counties serves as an alert to tune into an Emergency Alert System television or station for information.

Three Mile Island is located in Dauphin County, about 12 miles south of Harrisburg near northern York County.