Why it matters: A privately built microreactor at Idaho National Laboratory has passed a key test, sustaining its own nuclear chain reaction and pushing a new generation of small reactors closer to ...

Although nuclear fission, which powers nuclear reactors, can provide plenty of energy, it also produces potentially dangerous radioactive waste as a by-product. Now, researchers say they may have ...

Antares Nuclear's Mark-0 reactor has completed a zero-power fuelled criticality demonstration, becoming the first reactor to ...

The official verdict warns a nuclear incident at the STEP fusion project in Nottinghamshire could lead to “contamination of ...

This marks the beginning sustained nuclear fission chain reaction and brings the reactor one decisive step away from full operation.

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 ...

Is nuclear power the world's best hope for slowing climate change—or a high-stakes gamble that risks radioactive disaster? What if it's both? As the world seeks cleaner energy sources, nuclear energy ...