No, I think it'll be cheaper to use HVDC transmission and interconnects to network the largest electrical systems in the US [1] so that you can shift power across the continent. No need to run cables to Asia, Africa, or Europe. We already import clean hydro from Canada to parts of the US (specifically between Ontario and New York state). Also, as I mentioned, I expect the cost of battery storage to come down, to where it combined with renewables at ~1 cent/kwh is still cheaper than fossil fuels even assuming long duration discharge (8-10 hours).

I can call Tesla today and have a Megapack installed in a few months. Same for solar and wind utility scale installs. If I break ground on a nuclear reactor today, it will be at least a decade before you see the first kilowatt generated. Georgia's Vogtle units 3 and 4 nuclear generators are six years behind schedule and costs have ballooned to almost $10 billion [2]. $10B buys a lot of renewables and batteries.

[1] https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/NE...

[2] https://en.wikipedia.org/wiki/Vogtle_Electric_Generating_Pla...