That's interesting that it was exactly 7kg. Maybe they read this document first: (§ 40.22 Small quantities of source material.) https://www.nrc.gov/reading-rm

That's interesting that it was exactly 7kg. Maybe they read this document first: (§ 40.22 Small quantities of source material.) https://www.nrc.gov/reading-rm/doc-collections/cfr/part040/part040-0022.html https://www.nrc.gov/reading-rm/doc-collections/cfr/part040/p... "(a) A general license is hereby issued authorizing commercial and industrial firms; research, educational, and medical institutions; and Federal, State, and local government agencies to receive, possess, use, and transfer uranium and thorium, in their natural isotopic concentrations and in the form of depleted uranium, for research, development, educational, commercial, or operational purposes in the following forms and quantities: ... (2) No more than a total of 7 kg (15.4 lb) of uranium and thorium at any one time... "