dihay:

Ukraine’s highly enriched fuel came from the Soviet Union days.  There were many nuclear facilities here during that period and the country inherited the stockpiles produced.  It was also the owner of many nuclear weapons which it gave to the US after the country disintegrated.  I don’t think they are producing any more of this material ... certainly not in their commercial reactors.  But there may be a few research reactors around that are capable of making the right feed stock (plutonium which may also be in the stockpile that they intend to give up).  Not sure of all that is going on here as I’m not tapped into that information.

Glad to see my country of residence doing something about a big problem here.  With massive corruption at all levels, it is only a matter of time before one of the local crooks grabs some of this stuff and sells it to the highest bidder.  Getting rid of it all together eliminates this all to likely result.  A Ukrainian politician doing the right thing ... now that’s something for the record books!

What a whopper! Reactors do not produce enriched uranium 235 at any level of concentration. Enriched U235 has been produced by large mass spectrometers named calutrons or, more recently, by ultracentrifuges. Some nuclear reactors use U235 as fuel. They produce plutonium.