It makes zero sense to build them in datacenters and I don’t know of any safety authority that would allow deploying reactors without serious protection measure

It makes zero sense to build them in datacenters and I don’t know of any safety authority that would allow deploying reactors without serious protection measures that would at the very least impose a different, dedicated building. At some point it does make sense to have a small reactor powering a local datacenter or two, however. Licensing would still be not trivial.