More interesting might be what is the cost of dismantling and safely disposing of the reactors and their fuel rods.
When I was in college we were low on dome space and the school purchased an ocean liner that was going to be scrapped. Pulled it up to the school's dock on the Hudson River, put ballast in the bottom and turned it into a dorm with super party rooms and fraternity areas. It was there for a number of years until new dorms were finished and then the ballast removed and it was towed away. I lived on it for a year, which was fun.
SUPPORTING MEMBERBobWest Nyack Aviation, L.L.C. New York, New York - East Hampton, New York & Warwick, New York firstname.lastname@example.org