To be clear, the NS Savannah was a showpiece. It was part passenger, part freight in a way that made no economic sense but looked fantastic and showed the concept could work. It ultimately failed because it had to bear the brunt of port negotiations. But that's a policy hurdle.
Oh for sure, it was an atom corps show piece to flex their muscles, and probably also to entice ports to allow nuclear powered ships since many did not before it existed.
Also, she's currently for sale if you're interested. If they don't find a buyer it'll be scrapped.