Nevertheless, emergency preparedness is an important part of TVA's nuclear program. Emergency planners work closely with federal, state, and local agencies to develop, maintain, and practice emergency preparedness procedures. Drills are held throughout the year to practice and coordinate the activities that allow TVA to ensure the protection of the public and its employees. TVA has installed sirens within a 10-mile radius of nuclear plants to notify residents promptly in the event of an incident, and alert them to tune to their emergency broadcast stations. The sirens may also be used to warn area residents of tornadoes and other natural disasters.
Radiation is energy emitted as invisible particles, waves, or rays.
Radioactive atoms produce radiation as they disintegrate. Everyone is exposed to small amounts of radiation each day. Air, water, food, and sunshine are a few sources of natural background radiation. Radiation also comes from other sources, such as color televisions and medical x-rays. People are concerned about radiation exposure because it can alter or damage the human cell structure.