There are two big problems with nuclear reactors,

• long-term waste disposal
• capital cost

The first problem is political and our craven masters are unlikely ever to solve it. The second has always been addressable by technology and I am pleased to see that there is now some progress.

• https://www.theguardian.com/environment/2015/nov/24/mini-nuclear-reactors-answer-to-climate-change-crisis