Oak Ridge Reservation, Tennessee

The claim: Oak Ridge, 35,252

What it really is: The Oak Ridge National Laboratory is the largest science and energy national laboratory in the Department of Energy, and partners with the state of Tennessee, universities, and industries to solve challenges in energy, advanced materials, manufacturing, security and physics.

The facility is also home to several of the world's top supercomputers.

Nuclear Fuel Services, Inc., Tennessee

The claim: Erwin, 66

What it really is: Nuclear Fuel Services it a private company that provides fuel for the Navy's nuclear powered ships, and also converts weapons grade uranium into fuel for nuclear reactors.

Savannah River Site, South Carolina

The claim: Aiken, 198,400

What it really is: The Savannah River Site is a nuclear reservation that is owned by the Department of Energy.

The site was built in the 1950's for the refinement of nuclear materials in nuclear weapons, but none of the site's reactors are currently operating.

The facility itself has been the site of major clean up operations.

Bettis Atomic Power Laboratory, Pennsylvania

The claim: West Mifflin, 160

What it really is: The Bettis Atomic Power Laboratory is a government owned research and development facility that's sole purpose is the designing and development of nuclear power resources for the Navy.