Why don't they give it as a present to our friends in Taiwan? Better to have it watching the Commies than sitting in mothballs.
The reactor cores on subs are not refuel-able as I understand it or likely not cost effective to refuel. 20-25 years service and the fuel is spent. That's why they off load the spent fuel and case up the core for a nuclear waste site.
To get the reactor out it destroys the ship as it is one of the first things installed during construction. I may be wrong and some Bubble Heads will correct me but that's what I've been told is the reason. Nuclear powered carriers can be refueled once though. IIRC.