Roughly 12 metric tons of surplus plutonium is currently stored at the Savannah River Site, a figure that was recently declassified by the U.S. Department of Energy, a National Nuclear Security ...

Workers in Los Alamos National Laboratory’s plutonium facility tracked contamination throughout a waste staging area, according to a Defense Nuclear Facilities Safety Board report this month, alarming ...

WASHINGTON – A half-metric ton of weapons-grade plutonium secretly shipped into Nevada has been removed four years early under federal court order and an agreement reached by U.S. Sen. Catherine ...

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A manufacturing facility intended to reduce the U.S. plutonium stockpile by turning surplus weapon-grade material into a mixed-oxide (MOX) fuel may not be operational until 2048, according to the ...

On November 6, 1944, researchers at the Hanford Site in Washington first created weapons-grade plutonium, the radioactive element used less than a year later in the Fat Man, the atomic plutonium ...

Crews at the Hanford site recently finished demolishing the tricky Plutonium Finishing Plant's main processing facility in southeastern Washington. But the demolition gave contractors some real ...

You wouldn’t know it, because it’s hiding down there at the bottom of the periodic table of elements, but it’s a prank—something a five-year-old might do—and the guy who did it was one of the greatest ...

Plutonium is a metal, but it won't stick to a magnet, puzzling scientists for decades. Now researchers may have found this "missing magnetism." The hideout? Electrons that surround every atom of ...