Its interesting that there exists a photo of Zinn showing initial construction but supposedly no other photos. Someone must have blown a gasket when they found out about someone taking shots and put an immediate stop to it, perhaps Zinn’s boss, Fermi.
As a side note, the second photo shows University of Chicago All American Jay Berwanger who would be awarded the first Heisman Trophy. He is reported to have left a scar forever visible on the face of Michigan opponent and future president Jerry Ford.
As you know cameras would have been forbidden but back then few folks had them. My great neighbor took me through the old reactors in Oak Ridge. It was quite the tour.
His only advice... Don’t decide to go swimming just yet!....
BTW this plant I speak of was strictly DOD.