It seems like what radioactivity risks there are, will mostly be faced by the Ukrainians using the shells. And in DC or London, they certainly don't care about that.
I suspect the Russians are most upset because depleted uranium will be more lethal to their armor.
“DU is less radioactive, mainly emitting alpha particles”
So, I guess it’s ok if the Russians use their “VX-Lite”..
“It’s 1/3 fewer calories less less filling than the standard VX!”