The Fort Calhoun nuclear power plant plans to test its siren alert system on Tuesday.
Omaha Public Power District says the tests involve all its radio-controlled sirens within 10 miles of the plant. The sirens will sound for four minutes sometime between 9 a.m. and 10 a.m.
The siren system is designed to alert people of any serious accident at the plant. The sirens would sound to signal people that they should tune into local broadcast media and follow Emergency Alert System guidance
The plant sits 19 miles north of Omaha, across the Missouri River from Iowa.