Nuclear has been rendered obsolete by over-regulation by Government and irrational fears by common citizens. No massive nuke plant CAN be built, except in a state where utilities are "regulated" and the building entity can be assured of getting its money back in higher rates in the future. If it were not unconstitutional I would suggest that the Feds fund a couple new ones to get the ball rolling.
Nuke's only prospect in the foreseeable future is SMR's - Small reactors that can be manufactured in a plant then disassembled and reassembled on site. Where one is not sufficient, multiple units can be grouped together to meet the need.
On a related issue, "we" still have the problem of spent fuel (often improperly called. "nuclear waste") sitting around at nuclear power plants around the country. This should all be transported to a Federal repository such as Yucca Mountain or WIPP in New Mexico. In the future, it will inevitably be sought out for reprocessing and re-use; we have the technology to do that right now.