A puzzle with a two-part theme.

The microreactor from Antares, a private nuclear technology company, had a successful nuclear fission reaction for the first ...

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

Deep Fission is seeking an IPO that could raise $157 million, though investors may have trouble buying the nuclear startup's story.

The executive order directed the Department of Energy to have three different reactor designs reach criticality in a bit over ...

The department is looking to meet a White House-set deadline of having three reactors sustain fission reactions by July 4 of this year. The first advanced nuclear reactor has reached criticality as ...

China is leading the pack when it comes to developing nuclear power, and its 'artificial sun' is set to pave the way for many ...

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

Antares, a nuclear start-up, achieves a breakthrough with its Mark-0 prototype, paving the way for mini-reactors at US ...

Weapons-grade plutonium can fuel nuclear reactors known as mixed oxide reactors, but none of these exist in the U.S.

Nuclear power plants are safer than many suspect. But putting reactors in space is a concept with a checkered history. One notorious reactor caused an international incident in 1978 after it came ...