Is she worn out? Replace the reactors or whatever, return her to duty. Probably cheaper.
“Replace the reactors or whatever, return her to duty. Probably cheaper.”
That is the entire problem/expense. The reactors need replacing and they weren’t really designed to be removed.
And once you cut them out the cost of putting the ship back together would be staggering. A lot of nuke ships are designed to last only as long as the reactor. Some were designed for one mid-life refueling but even that is now considered not worth it.