Three Mile Island to test emergency sirens Thursday

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Three Mile Island: 35 Years Later

Emergency sirens have been scheduled for testing on Thursday at the Three Mile Island nuclear power plant. The semi-annual test will sound for three minutes beginning at 12:15 p.m. on June 5.

The 96 sirens are located within 10 miles of the plant, and are in place to warn residents of a nuclear accident.

The plant, in Londonderry Township, is owned by Exelon.


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