why submarines use nuclear power, but other sea-faring military vessels don’t.

Question

Realised that most modern submarines (and some aircraft carriers) use nuclear power, but destroyers and frigates don’t. I don’t imagine it’s a size thing, so I’m not sure what else it could be.

In: Engineering

Answer 1

As a general rule of thumb, the answer to “Why don’t we use nuclear for…?” is always because it is prohibitively expensive to do so.