Yes, I am aware of the difference between high and low level fuel and the stew of different half lives of the constituents of higher level fuel. There's 47 k t

Yes, I am aware of the difference between high and low level fuel and the stew of different half lives of the constituents of higher level fuel. There's 47 k tones of high level waste in the US alone [1].So I think it's fair to assume that your 80 000 tonnes world wide was high level waste. Which has to be kept far apart from each other since they decay and at the very least generate heat. Therefore, apartness is an integral part of repository design. Yucca Mountain has a capacity for 70 000 tonnes. That is, its not big enough to store the world's waste despite nuclear power having a small fraction of the overall worldwide power production over the last 60 years. [1] https://en.wikipedia.org/wiki/High-level_radioactive_waste_management https://en.wikipedia.org/wiki/High-level_radioactive_waste_m...