Nuclear is way more expensive than other renewables and even gas. It takes a long time to build too. What no one seems to be exploring is creating a world wide array of solar panels so that everyone has power when they need it. Atleast US, Africa, India and Europe could do it together.

https://www.reuters.com/article/us-energy-nuclearpower-idUSK...

Edit: Hell, US alone could do and get over peak demand in the evenings by having panel array spread all over the country.