If I get into office, I'm going to rename those ships wholesale. Goodbye USS Texas, hello USS Bergall. Adios, USS Dallas, hello USS Pomfret. Double-ditto the CVN's. And you'll see the Constellation, JFK, and Kitty Hawk come back from the boneyard faster than you can say "but my peace dividend!....."
Renaming ships once they've been christened is considered bad luck.
KITTY HAWK has seen her full designed life Connie as well but they can remain as active reserve carriers for training. That is another protocol being broken is the elimination of the reserve as in immediately deployable carrier usually used for training purposes. They generally do not deploy but do have work ups off the coast. JFK unofficially served as such during the Clinton years. The JFK if what I've heard is true is wore out. She was done much like the AMERICA and was refused Ship Life Extension Program. Second option is have NNSB &DD turn out two conventional which do have advantages nukes do not. This allows for far shorter qualification times of the snipes.
The Navy can have a conventional snipe standing second and third skill level Machinery room watches before the Nuke snipe ever see's even a ship and still has to qualify for watch. By a snipes second cruise he should be well skilled in his job for his pay grade and if an E-3 making E-4 right before or during the second cruise. You can do this without the snipe even going to any schooling beyond basic training. The leave basic and do 6 weeks or used to be 6 weeks in either fireman, seaman, or airman advanced training and they go to the ship. Time elapsed about 4 and a half months. NCO status in the Navy is E-4.
This would not only effects Machinist mates but nearly all engineering ratings. Despite the hype nukes require as much down time as conventionals. You are still dealing with steam turbines etc and a 1200 PSI steam system. It's not a matter of the reactor holding up it's a matter of the other equipment that requires maintenance much of it requiring a shipyard environment for safety and needed tooling etc.
If nuke carriers aren't seeing a standard 3 month yard period after each deployment then something bad is wrong. As well they also like a conventional should see drydock after the third six month deployment or every 5 years. This is for valve replacements, hull maintenance, screw repairs, rudder repairs, etc. It still must be done. At half life Nuke carriers require a 5 year overhaul for refueling and reactor issues.