Poland was ~80% coal before Ukraine. It wasnt energy independence which got them interested in nuclear power it was the idea that they might one day want a nuclear bomb (in case the current nuclear umbrella goes away).
It's never an economic decision to build nuclear power stations. They're 5x the cost of solar and wind.
If we actually cared about making nuclear cheap - getting rid of the political barriers to building Gen IV reactors, not throwing away our “waste”, it would beat the pants off solar by operating 24/7 and not using up all our land.