Well, there are problems with only relying on renewable power sources. Weather patterns change. At a glance, it would make sense to build smart a nuclear grid,

Well, there are problems with only relying on renewable power sources. Weather patterns change. At a glance, it would make sense to build smart a nuclear grid, then integrate distributed renewable power and storage options as appropriate. That gives the grid excellent redundancy and starts working on the current problems immediately while providing breathing room for the renewables. The nuclear plants could then be used as backups and power government supercomputers when not needed (or something).