Now nuclear submarine systems tend to rely on highly processed fuel which is not easily adapted for making weapons grade plutonium unlike a standard nuclear power station and it would be harder to regulate the materials with smaller nuclear sub stations.
Nuclear power is only remotely possible economically when your subsidising it with weapons grade plutonium sales.
So the quest is on to build stable hydrogen fusion and it's always 30 years away and drains money.
There is the option of thorium nuclear waste burners which in time could be more cost effective than standard nuclear power station but quite a bit of time and not that cost effective when you add in arms subsidies.
Stable and energy generating micro fusion reactors could emerge before bigger ones which might allow us to fast track making radio active waste material into safer material.
However if we need a bit more power we should use gravity counteracting kinetics and electromagnetic force distribution manipulation we can then collect a little extra from orbit but beyond that we don't need any more energy for the amount of energy humans limited to earths dynamic would need if they we efficiently enough. The only nuclear we need is the sun but we do need to clean up our mess in a green way.
May this post add one more nail in the coffin to bomb economics although quite a lot of nails are needed but hey i'm willing to put in against such and with enough elite sway and critical mass the human dynamic could work circular and bomb free because we're not all free from bomb economics and does it really do anything for a commoners lot even if that commoner has become rich.