they basically already have endless, mostly free power in the sense you are getting at. that it isn't clean is irrelevant to their use case. china, iran, the

they basically already have endless, mostly free power in the sense you are getting at. that it isn't clean is irrelevant to their use case. china, iran, the united states, etc. militaries are not hurting for energy and already make heavy use of small nuclear reactors where just hauling fuel is not an easier choice.