[toast0]

Finding appropriate sites for generators would probably be the engineering limit for nuclear. I don't know if nuclear is easy or hard to get started in a black start condition; if they're hard to start, there's probably a max % of the grid you'd want to be nuclear.

But the will of the people and regulatory hurdles mean permitting and construction is slow and economics are not great. Also, there's probably a manufacturing capacity issue; if you wanted to get 100 new plants online in the next 5 years, and permitting and siting were a non-issue, getting the parts made would be.

[Gibbon1]

There are also technical skills and geopolitical issues with nuclear don't exist with solar. You can deliver solar panels to the Southern Congo on truck.

Also you have a choice, build a nuke plant that will produce power for 50 years. Or buid a plant to produce solar panels for 50 years. That's an accounting problem that would be interesting to see the results of.