The article said nothing about the workings of the 'nuclear reactor'. I assume it's just an RTG. They sound great until you look up the price tag: many orders of magnitude more expensive per mwh compared to conventional energy sources.

Russia gave out small reactors to many citizens in remote villages back in the 50's

The problem with these has never been technical. Obviously, nuclear ships and submarines have lots of mini nuclear reactors and they're effective and safe. The problem is the government will never let you operate one. That's the realm of 18 year olds with a couple of weeks of training.