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Why data centers want to have their own nuclear reactors
(english.elpais.com)
This is a most excellent place for technology news and articles.
Just one note, nuclear power plants run at around 35% efficiency. This is because they are basically steam generators and tend to not push as hard for safety. I think they can get up to 40-45% with combined cycles and such, but then we are in the "very large" territory
Large scale data centers, like the ones that end up in the news for FAANG are ~100 megawatt footprints.
I have no idea where you're getting 3.4 megawatts as the largest data center in the US, but that is wildly undersized.
Probably in northern Utah.