Nukes are not competing with carbon sources. Against renewables (+storage, eventually) nukes lose on every axis: safety, capex, opex, construction time, other environmental impact (e.g. U vs other mining).
There is no place where nukes come out ahead, so no place where building more is the right choice. Continuing to operate them where they are can be OK, for now.
Whatever renewables + storage they build reduces their operating cost.
There's nothing at all "cheap" about NG.
In the future, the fuel will be synthetic, and cheaper than NG.
And again, for the nth time I'm asking you here, where the fuck are you going to get it from? If it was so easily available, Europe wouldn't be screaming right now, and no one would care about Russia.
Mostly it's people falling off them when installing or maintaining them.