Comment by bobmcnamara

I thought I'd mention that ship supplied short power has been a thing for ages. USS Daniel Webster even trained for this for new years eve apocalypse nothingburger. And its almost always been used for only powering something critical. Today's subs are <10MW. Nothing for utility scale. I can't imagine the economics are ever good. More of a: we've already got this boat.

https://thenaptimeauthor.wordpress.com/2021/04/09/the-uss-le...

https://www.upi.com/Archives/1982/11/26/A-nuclear-submarine-...

There are some floating PWRs: https://en.m.wikipedia.org/wiki/Russian_floating_nuclear_pow...