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.

A catastrophic reactor failure left a nuclear submarine on the brink of explosion deep beneath the ocean. With no backup ...

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

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 ...