Having done a number of jobs at Y-12 I often heard that it was like building a Ferrari in a model-T factory. Upgrades and demolition have been and will continue to be a reality for the site. I remember the old firehouse it looked like a big garage. The pictures of the new one are impressive.
In Quarters: Y-12 National Security Complex Fire Department, Oak Ridge, TN
https://www.firehouse.com/stations/in-quarters/media-gallery/55302911/fire-station-architect-firm-bkv-group-firehouse-designers-y-12-national-security-complex-fire-department-oak-ridge-tn