Nuclear requires a lot of dereg and testing that will be decades out if we start today. This assumes the barriers of popular rejection can be overcome. China might pull it off, but I don't see the US radiating enthusiasm for it. But yeah, since few places on earth can take advantage of hydro, I don't see any long-term alternative to nuclear.
The key parameters in a nuclear build are:
1) the construction time (impacted by regulatory regimes)
2) the cost of capital (interest rate of tying up money)
3) an uncertainty factor about getting shut down (impacted by regulatory regimes)
In China, 1&2 are 3-4 years and 2% respectively. In the US they are 8-9 years, 15% and maybe 50% chance you'll be shut down before you can finish. [0]
The nuclear plant has a strike price twice as high as the offshore wind.