Radioactive plutonium and americium have been found in air samples collected at the Rattlesnake Barricade just off public Highway 240, where workers enter the secure area of the Hanford nuclear ...

Nov. 24—LOS ALAMOS — It's been decades since the U.S. Department of Energy wrapped up a cleanup of a Los Alamos canyon and declared it safe for public recreation. Starting in the 1940s, Acid Canyon ...

An internal Hanford memo obtained by the KING 5 Investigators reveals radioactive contamination was found in air samples taken on June 8 on a public highway bordering the site. Radioactive particles ...

Opinions differ on whether the half ton of weapons-grade plutonium secretly shipped by the U.S. government to the Nevada National Security Site could impact residents’ health and the environment.

Add articles to your saved list and come back to them any time. Plutonium is a highly radioactive silvery metal that is used in nuclear bombs and nuclear power. It is a heavy and essentially man-made ...

Plutonium has occurred naturally, but except for trace quantities it is not now found in the earth's crust. It was first isolated in 1941. A typical large nuclear power reactor creates about 230 ...