Contact: Patrick Flynn
Email: Patrick.Flynn@duke-energy.com
Office:  843.951.5291
24-Hour: 800.559.3853
Date: December 12, 2025

Nuclear siren testing scheduled for January 7 around Brunswick Nuclear Plant

  • Five- to 30-second quarterly test scheduled between 10 and 11 a.m.
  • No public action required

SOUTHPORT, N.C. – Duke Energy and county officials will test the outdoor warning sirens around the Brunswick Nuclear Plant between 10 a.m. and 11 a.m. on Wednesday, Jan. 7, 2026.

Why it matters: To ensure they are functioning properly, sirens will sound for five to 30 seconds. Anyone who hears a siren during scheduled testing does not need to take action.

  • During testing, some sirens may be tested more than once. Follow-up testing after siren maintenance may be required after 11 a.m.
  • Because this is a test, local broadcasting stations will not interrupt regular programming to broadcast Emergency Alert System (EAS) messages. If there was a real emergency requiring the sirens to be sounded, local radio and television stations would broadcast information to the public.

By the numbers: Duke Energy owns and maintains a network of sirens within 10 miles of each of its nuclear plants, including 38 sirens around the Brunswick Nuclear Plant.

Emergency partners: Testing is performed in cooperation with emergency management officials in Brunswick and New Hanover counties, who are responsible for sounding the sirens.

More info: Additional details about outdoor warning sirens and nuclear emergency preparedness are available at duke-energy.com/NuclearEP.

Duke Energy Progress

Duke Energy Progress, a subsidiary of Duke Energy, owns 13,800 megawatts of energy capacity, supplying electricity to 1.7 million residential, commercial and industrial customers across a 28,000-square-mile service area in North Carolina and South Carolina.

Duke Energy

Duke Energy (NYSE: DUK), a Fortune 150 company headquartered in Charlotte, N.C., is one of America’s largest energy holding companies. The company’s electric utilities serve 8.6 million customers in North Carolina, South Carolina, Florida, Indiana, Ohio and Kentucky, and collectively own 55,100 megawatts of energy capacity. Its natural gas utilities serve 1.7 million customers in North Carolina, South Carolina, Tennessee, Ohio and Kentucky.

Duke Energy is executing an ambitious energy transition, keeping customer reliability and value at the forefront as it builds a smarter energy future. The company is investing in major electric grid upgrades and cleaner generation, including natural gas, nuclear, renewables and energy storage.

More information is available at duke-energy.com and the Duke Energy News Center. Follow Duke Energy on X, LinkedIn, Instagram and Facebook, and visit illumination for stories about the people and innovations powering our energy transition.

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