i think the idea of reusing brownfield sites for nuclear reactors is overhyped. 1. nuclear power plants have special requirements regarding where they can be placed that coal plants don't. evacuation zones, etc. 2. water-cooled water-moderated reactors don't generate steam with the same parameters as coal plants. so the turbines will not be compatible. you can make nuclear reactors that do however then your capacity factor will be lower because you're throwing 60+ years of water-based operational experience to the wind 3. the savings from reusing coal plant infrastructure is nullified by the wastefulness of constraining your reactors by the size and requirements of a coal plant. as for lack of locations - you can relatively cheaply build power lines that are dozens or hundreds of kilometers long, with little power loss on the way. so you have lots of places to choose from. furthermore, in the us, many nuclear power plant sites were sized for more reactors that were never built, so there are obvious places to put them.
Pirate