It's a DOE matter. And it is a COMMERCIAL transaction, not one with national security implications.
I am not saying there was no corruption in the sale; I don't know about that either way. Russia is as corrupt as it gets. But I am saying that this has nothing to do with weapons. The sale involved low-enriched uranium usable only in nuclear power plants. It has no military function.
Russia uses plutonium in almost all its nuclear weapons, not uranium. Plutonium can be extracted from nuclear waste produced at power plants, but Russia has no need to do so, since it has literally thousands of tons of the stuff that it extracted from the tens of thousands of weapons destroyed since the end of the Cold War. It does not need more.
This was a commercial transaction, in other words.
I have already explained many times that this was not a State Department decision.