Aren't all military submarines and aircraft carriers using nuclear power already? No reason they couldn't make it work as long as regulations allow them in ports.
No reason the ships can't be built but turning a profit is another thing. US nuclear-powered aircraft carriers cost ~$10 billion, though of course they have many other requirements.
Flying to the Moon can be made to work - it's been done for 56 years. But turning a profit is trickier.
Flying to the Moon can be made to work - it's been done for 56 years. But turning a profit is trickier.