About 1,000 TVA and state of Alabama employees and local emergency responders in Lauderdale, Lawrence, Limestone, Madison and Morgan counties are expected to participate.
Residents may see radiological monitoring teams or other responders in action as part of the exercise. They also may hear on-site and off-site sirens, and they may notice activity at Calhoun Community College's Fine Arts building in Decatur, Ala., where a joint information center will be established.
The exercise is required annually by the Nuclear Regulatory Commission (NRC) for all nuclear plant operators and every two years by the U.S. Department of Homeland Security for state and local agencies. A drill at Browns Ferry on May 8 was preparation for this exercise.
NRC and Homeland Security representatives will evaluate responders on the appropriateness of their actions to ensure the health and safety of the public.