During the Trinity test, physicist Enrico Fermi conducted a simple yet ingenious experiment by dropping paper scraps to estimate the atomic bomb's explosive yield. This method, rooted in physics, ...

The Rulison test — conducted at a depth of 8,425 feet — was the deepest subterranean nuclear-bomb detonation conducted in U.S. history.

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is trying to spur negotiations on a new accord now that a last Cold War treaty ...

New START, and treaties like it, represent humanity’s uneasy attempt to coexist with its own capacity for destruction ...

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

A top arms diplomat at the State Department recently laid out what might come next as Washington upends decades of federal policies on nuclear proliferation.

Radiant, a manufacturer of portable nuclear microreactors, has received approval from the US Department ...

The US Nuclear Regulatory Commission has approved a new license that allows TRISO-X to ...

X-Energy Reactor Co., an advanced nuclear company backed by Amazon.com Inc., received federal approval to make uranium fuel for advanced reactors, the first such new license in more than 50 years.

Last year, an explosion at U.S. Steel's Clairton Coke Works outside Pittsburgh killed two U.S. Steel workers and injured 11 ...

In a milestone for the U.S. nuclear fuel cycle, the Nuclear Regulatory Commission (NRC) on Feb. 13 issued its first approval of a commercial Category II ...

Helion Energy achieved temperatures of about 270 million degrees Fahrenheit as it works towards developing fusion power.