By the end of the year the physicist Werner Heisenberg had calculated that nuclear fission chain reactions might be possible. When slowed down and controlled in a "uranium machine" (nuclear ...

A controlled nuclear fission reaction releases one million times more energy per kg than a chemical reaction such as burning coal, oil or gas. This means much less fuel is required than for a ...

Although to most the term ‘fission reactor’ brings to mind something ... Aircraft Reactor Experiment. General diagram. (Source: ORNL) Even though many newly licensed or about-to-be-licensed ...