Watch the recent video by Technology Connections on how fissile fuels are lying about green energy. Scale isn't an issue. We can literally produce 1.8 times the needed energy for the entire US just by replacing 25% of the corn we grow with solar panels. Just for reference, that 25% isn't being used as feed, human or animal, it's being fed to cars as ethanol. If we were really motivated about it, we could replace all energy production to green energy within 5 years. 10 at the outside.

I realize that nuclear doesn't produce much in the way of physical waste, but there's an awful lot of heat waste with any Rankine cycle, so I'm still not going to support nuclear at any scale. We are having some excess heat issues on Earth at the moment, if another Ice Age gets triggered we can talk, but until then, nuclear doesn't provide the benefits as cost efficient you think it does.