Nation-states don’t have any problem getting uranium…and weapons proliferation isn’t a concern with any nuclear power. In other words, these could be installed widely in suitable US, British, French, Israeli, Russian and Chinese locations with no concern at all.
https://thehill.com/policy/defense/4510010-plutonium-pits-us....
Also, there are a lot more ways to produce weapons grade nuclear materials now than there were in the 1970s when most of these weapons were created. The invention of lasers, high temperature superconducting magnets, higher quality centrifuge materials, and better particle accelerators have made the creation of weapons grade material way easier.
In other words, when it comes to weapons proliferation, we are so utterly screwed. Only political change will ever reduce the number of weapons in existence. Commercial power production isn't even a factor.
https://apnews.com/article/iaea-iran-nuclear-enrichment-stoc...
Another important example because they're at war, Ukraine. And in the vaguely possible event of an Asian Pacific war, Japan and Australia have no nukes, but that's more by choice.