And the grid already has good connections to those sites.
Whether that actually can be done is another question. Many people want traditional nuclear located as far away as possible from populated areas, but with coal they aren't as picky about location.
NuScale's version of nuclear is supposed to be much safer, but who knows if that will put people at ease enough that it can be put wherever is convenient.
What's interesting is that these are actually getting used for solar and wind projects today for mostly the same reason (connection to the grid that exists; new transmission takes years to come online if it ever does)