Waste is the issue.
The world as a whole needs to find a viable long term solution for reducing the amount of radioactive wastes from nuke plants and more realistic methods of dealing with the waste they do make.
The current technology used around the world was chosen in part to provide weapons grade materials for the military. Take those requirements away and other technologies become available that can produce as much energy with less waste.
Some of these alternate technologies have been around for decades, but the US government always short funded the research because they failed to meet the weapons source standard.
