So, you think being in the room with the "demon core" was dangerous even when it wasn't being used? The radiation from it in a non-critical state would have been very small. If he had been there during a criticality accident it would have been recorded.
I think you're just waving your hands here because you have no evidence to support the claim.
Everyone (and many family members) working at SSFL 15 years later died early of contamination. They were careless in those days. Probably had a few buckets of the stuff laying around like at the Grand Canyon gift shop.
I think you're just waving your hands here because you have no evidence to support the claim.