Speaking of subsidies, nukes are fraught with them. As for 4G

https://en.wikipedia.org/wiki/Generation_IV_reactor
Generation V reactors refer to reactors that are purely theoretical and are therefore not yet considered feasible in the short term, resulting in limited R&D funding.

And from 2010, when solar was much higher priced than today (and realizing that wind is cheaper than solar)
http://www.nytimes.com/2010/07/27/business/global/27iht-renuke.html
In a “historic crossover,” the costs of solar photovoltaic systems have declined to the point where they are lower than the rising projected costs of new nuclear plants


Please go read DoE LCOE analysis and look at worldwide PPAs.