Waste that is too radioactive for treatment gets sealed for safekeeping, and the containers redefine strength. They must last at least 50 years and be able to survive a drop-test from three stories up. The canisters, made from cast metal or heavy concrete, can cost more than $1 million apiece.
No problem, right? All that stuff will go to Yucca Mountain, which we US taxpayers have spent billions developing.
Perhaps the problem isn't as hard as it is made to be.
Per the quote above, the dismantled radioactive debris is already confined. We could do the same for exhausted fuel rods and the like: vitrification to contain the waste.
Then load the various containers and vitrified waste onto ships, and haul it all to the subduction zone off the Aleutian islands. Once there, lower the waste blocks by cable until they are some distance above the bottom so that when released, they embed themselves in the sea floor sediment.
Already contained, the sediment will provide even more containment. And since the stuff was dropped into a subduction zone, it will ultimately return to the Earth's mantle, it will get recycled.
Over to you, Clovis. Why is that a dumb idea?