In principle that is possible, but NK weapons are relatively low-yield and the estimated number of warheads they could manufacture in total is relatively low; and as bad as damaged reactors are, they’re significantly less bad than a nuke in a city, even a small nuke like NK’s.

Don’t get me wrong, I certainly hope the USA strategic and tactical defences are capable of facing even the worst case estimates; but, as a civilian, NK nukes and ICBMs never put me off visiting the USA and played no part in my ultimate decision to not bother trying to move to the Bay for work.