Do they still run stock Windows PCs in a nuclear facility? Do they still have critical machinery participating in insecure local network? Well, maybe it isn't

Do they still run stock Windows PCs in a nuclear facility? Do they still have critical machinery participating in insecure local network? Well, maybe it isn't a nuclear lab after all, but a honeypot for hackers? And the actual lab is somewhere else? Because otherwise they would figure it out already, I think.