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Nuclear Power Plant

Nuclear power plants use the heat generated from nuclear fission in a contained environment to convert water to steam, which powers generators to produce electricity.  Nuclear power plants operate in most states in the country and produce about 20 percent of the nation’s power.  Nearly 3 million Americans live within 10 miles of an operating nuclear power plant.

Although the construction and operation of these facilities are closely monitored and regulated by the Nuclear Regulatory Commission (NRC), accidents are possible.  An accident could result in dangerous levels of radiation that could affect the health and safety of the public living near the nuclear power plant.
 

Local and state governments, federal agencies, and the electric utilities have emergency response plans in the event of a nuclear power plant incident.  The plans define two "emergency planning zones."  One zone covers an area within a 10-mile radius of the plant, where it is possible that people could be harmed by direct radiation exposure.  The second zone covers a broader area, usually up to a 50-mile radius from the plant, where radioactive materials could contaminate water supplies, food crops, and livestock. 

 

The potential danger from an accident at a nuclear power plant is exposure to radiation.  This exposure could come from the release of radioactive material from the plant into the environment, usually characterized by a plume (cloud-like formation) of radioactive gases and particles.  The major hazards to people in the vicinity of the plume are radiation exposure to the body from the cloud and particles deposited on the ground, inhalation of radioactive materials, and ingestion of radioactive materials.

 

Radioactive materials are composed of atoms that are unstable.  An unstable atom gives off its excess energy until it becomes stable.  The energy emitted is radiation.  Each of us is exposed to radiation daily from natural sources, including the Sun and the Earth.  Small traces of radiation are present in food and water.  Radiation also is released from man-made sources such as X-ray machines, television sets, and microwave ovens.  Radiation has a cumulative effect. The longer a person is exposed to radiation, the greater the effect.  A high exposure to radiation can cause serious illness or death.

 

If an accident at a nuclear power plant were to release radiation in your area, local authorities would activate warning sirens or another approved alert method.  They also would instruct you through the Emergency Alert System (EAS) on local television and radio stations on how to protect yourself.

 

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