Just remembered a tv prog about Sellafield. They have an area there that is a huge water tank. In it are a large number of skips with radioactive material (waste) in them. They don’t know what exactly is in each one and are slowly dealing with them. Removing the contents and enclosing them in concrete. The presenter, film crew, guide were on a very limited time filming there!
The big issue with radioactive waste is not the uranuim/plutonium/neverendium, it's the protective gear and tools. If you imagine the numbers of staff involved and their protective gear, this has limted use and all of it has to be safely contained "forever". As Alastair said, no regard was given when dreaming up nuclear power, to the safe disposal of anything.
EV's are the same. Nobody wants to have an EV with end of life battery fail. Disposing of EV's at end of life is never mentioned. Arguably the manufacturer should be responsible, but that will never happen. And so it remains maybe the biggest issue of what is trumpeted as a totally green solution, which clearly isn't. Just like nuclear.