From: somewhere in Massachusetts
Nuke power is nice. It's clean ('cept when you want to get rid of the stuff) and practically has no limit in endurance terms. Engine control rooms are pretty much automated and very pushy button with lots of nice exotic lights. However, there is one important thing to keep in mind. Nukes are STEAM PLANTS folks. Even the subs. In simple terms, the nuclear reactors merely replaces the boilers!
All steam turbines, even those of the USS Enterprise, are designed to operate at a given steam pressure and temperature. The limiting factor for maximum speed, under design parameters, is ususally going to be steam turbine speed, and the resulting bearing temperatures. These are large, costly, chunks of alloys and oil. Not even the fleet Admiral is going to risk his career, the ship's safety and million and millions (say that like Carl Sagan) of $$$$ in repairs and downtime, running it as a dragster.
Besides that, the nuclear plant itself is designed to specific parameters. Operating at excessive pressures and temperatures is a danger to the vessel, its crew and even me, if its parked anywhere near Boston.
Simply put, the blessing (?) of nuclear power bestwed upon USN vessels, isn't the amount of power generated (needed for speed......just like horsepower under your Honda's hood); but rather the endurance the vessel enjoys while conducting air ops or sub patrol.
Einstein says 'nuthin is infanate. It only changes state. (And he don't mean like from Utah to Nevada!)
P.S. The answer is no, I never sailed a nuke. But from what I understand, it's kinda like making toast; turn that dial all the way up and its gonna get burnt!