Here’s how it works. A rendering of Rolls-Royce's proposed space micro-nuclear power system. (Image credit: Rolls-Royce) A new image shows a possible version of future space propulsion.

The Rolls-Royce SMR, a 470 MWe design based on a small PWR, has progressed to the second stage of the UK's Generic Design Assessment, the only SMR to reach that stage so far. It is one of six SMR ...