Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

Oklo and LANL have conducted first plutonium fast reactor tests at NCERC, validating surplus fuel for advanced reactors like ...

China is building two advanced nuclear reactors with Russian assistance that will produce plutonium for Beijing’s rapid buildup of nuclear weapons, according to a new Air Force think tank study. The ...

Outdone only by nuclear fusion, the process of nuclear fission releases enormous amounts of energy. The ‘spicy rocks’ that are at the core of both natural and artificial fission reactors are generally ...

Nuclear fission is a powerful phenomenon. When the conditions are right, atomic nuclei split, releasing neutrons that then split other nuclei in an ongoing chain reaction that releases enormous ...

WASHINGTON, Oct 22 (Reuters) - The U.S. Department of Energy expects to begin announcing by December 31 which companies will take about 19.7 metric tons of surplus Cold War-era plutonium for eventual ...

Here’s how a nuclear bomb actually works. The B61 and the B83 nuclear bombs currently in the United States’ arsenal are thermonuclear, or hydrogen bombs, and quite different than the fission weapons ...

A light-water reactor could provide more weapons-grade plutonium, abetting the North Korean leader Kim Jong-un’s vow to expand his nuclear arsenal. By Choe Sang-Hun Reporting from Seoul In what would ...