Nontoxic Rockets?

[Bruno]

Originally Posted by Johnny1A.2

On small nit, you probably couldn't use a true submarine reactor for an orbital system, because my understanding is that such naval reactors depend on gravity to function properly, so they'd have trouble in orbit.

Well, yes. "Like" from a nuclear submarine, as in "here is evidence we can make portable reactors", not "cut one out and mount it on your rocket".