500kgs of unenriched yellowcake, 500kgs of wepons grade
uranium packed as described would produce a prompt
criticallity event.


Not if they loaded the way they they loaded U-234.
Alone the way how they were packed and transported proves that the cargo of
U-234 was not yellow cake.

The gentlemen concerned disagree , I prefer their version to yours.

I know this gentleman (in person).period.