And just to be clear, it would be "a bore shaft", not "many bore shafts". The amount of nuclear waste generated per person per lifetime is so small you could pick it up and carry it. So a single well positioned mine with good geology could literally store all of it the US could generate for centuries.

Well price it in then. Storage cost per anum times the time it is needed + the bureaucratic cost to ensure it is there till the end of its lifetime.

I know that Germany is seeking a nuclear waste storage site (unsucessfully) for two decades now. So simple.