Amazingly enough EVERY carrier that has fought in air-to-air and ship -to ship action used oil
there is no reason for N Power if the rest of the battle group still use oil
We don't have a large commercial Nplant available and it would take years to develope one (the French took 15 years and the CDG is still not right)
The two new UK carriers would wipe the floor with anyone other than the USN in a fleet action - so why do we need a Gerald Ford???