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Siren Tests Nuclear Emergency Preparedness

Oct. 16, 2015: To support annual maintenance of Harris Nuclear Plant sirens located within the 10-mile area around the Harris Plant, full-volume tests will be conducted on each of the 83 sirens over the next several weeks. The tests will last approximately five to ten seconds. The work will be conducted Tuesday through Thursday, between 7:00 a.m. and 5:30 p.m. Since the sirens are tested individually, it is difficult to provide specific times when residents of Chatham, Harnett, Lee and Wake counties can expect to hear any of the sirens. As a reminder, the sirens are designed as outdoor warning devices and may not be heard inside.

Siren testing is part of normal maintenance, and no public action is necessary.

2015 Siren Test Dates

Low-volume tests

  • February 17
  • May 12
  • August 18
  • November 10

Full-volume test

  • September 15

Full-volume siren tests are scheduled to occur on Tuesday mornings to minimize inconvenience for plant neighbors. The tests, which last up to three minutes, are conducted to make sure each siren works properly.

The sirens in the 10-mile Emergency Planning Zone (EPZ) around the plant serve as an outdoor warning system in the event of an emergency. If an emergency at the plant required the sirens to be sounded, sirens would sound repeatedly.  If you hear a loud, steady sound coming from one of the sirens around the nuclear plant, tune to a local radio or TV station for more information.

Hearing a siren does not mean you should evacuate.  Local radio and television stations would be the primary means of providing information and instructions to the public. Sirens would be sounded, but they would not necessarily be heard inside homes or businesses.

    Listen to a sample siren test


 If you have questions, please call Duke Energy at 919.362.3261 or 800.443.8395.