I suspect that is just Nuclear Power Plants. There are way more nuclear reactors than that in the US.
Today I learned
Well, a nuclear power plant typically has at least one reactor.
Being less of an ass, yes, you're right, there's also reactors not part of a public electricity generating station. Mostly military, but some for training.
There are a whole lot of nuclear reactors used in medicine. NC State University used to have an active one, I don’t know if they still do.
Also it would be remarkable if any Nuclear Power Plant had a single reactor. I am pretty sure they all have multiple reactors.
There's also about that many nuclear powered ships in the US Navy.
The last data I have is from 2017, and claimed 92 reactors on 81 ships. I believe that is 70 submarines with a single reactor each, and 11 carriers with two each.
and most are pretty old, i think GA is the only state with a new one, SC tried to build new reactors but failed for financial reasons
That ga one finally got finished...
Holly daddy corruption did they thing get milked