A Nimitz carrier transported to 1941

If a Nimitz-class carrier appeared in 1941, would the United States dismantle it for its reactor?

Probably not. The ship would remain operational while selected nuclear specialists shared knowledge with the Manhattan Project.

The United States would probably keep a Nimitz-class carrier in commission rather than strip out one of its two reactors. The plant had little direct use for the Manhattan Project, and removing half the ship's propulsion would destroy much of its operational value. Its modern nuclear engineers could instead contribute knowledge, including safer practices for handling radiation. The carrier, aircraft, and remaining crew would therefore stay together as a unique combat asset while selected specialists assisted scientific work.