As the cloud cleared, Air Force bombers dropped in to gather air samples. Researchers hoped that the radioactive fallout ...

In 1952, a Canadian nuclear reactor suffered the world’s first meltdown during what was supposed to be a routine test.

On April 26, 1986, the No. 4 reactor of the Chernobyl Nuclear Power Plant, near Pripyat in the Soviet Union (now Ukraine), ...

Study models the consequences of failure at Egypt's El-Dabaa nuclear reactor and warns the impact would extend up to 50 miles ...

Since the 1950s, the Idaho National Lab, known locally as “the site,” has been the testing grounds for nuclear reactors for ...

Commercial nuclear reactors all work pretty much the same way. Atoms of a radioactive material split, emitting neutrons.

With Japan preparing to restart a nuclear reactor, the world's largest, in the coastal prefecture of Niigata, a Newsweek map ...

Professor Katsuhiko Ishibashi, a seismologist and a former member of a Japanese government panel on nuclear reactor safety, ...

If all workers do in fact leave the plant, the nuclear fuel in all three reactors is likely to melt down, which would lead to wholesale releases of radioactive material — by far the largest accident ...

Tokyo Electric Power Company Holdings Inc. is slated to reactivate the No. 6 reactor at its Kashiwazaki-Kariwa nuclear power station in central Japan as early as Jan. 20. This will mark the first time ...