alt Hacker News> I find this to be the most frustrating aspect of the nuclear discourse. The "waste problem" is technically solved (we believe, gotta wait ~10k years to know)
It's not a 10k year problem, it's a ~300 year problem, after which most of it is at the same level as natural uranium ore; and the stuff that isn't can be blocked via aluminium foil (to stop beta particles).
The first 10-20 years post-removal are the most dangerous, and why the fuel is kept in cooling ponds. From 10-300 you still have danger, but that is manageable with concrete casts:
* https://xcancel.com/MadiHilly/status/1671491294831493120
* https://xcancel.com/ParisOrtizWines/status/11951849706139361...
Once you're past the ~300 year mark, all the most dangerous isotopes have burned away, and you're at point where the main ways of getting ill from what remains is by either eating the pellets or grinding them up and snorting the powder like cocaine.
That's fair and I'll admit to using a bit of hyperbole with that number. My point is that we are designing solutions for time scales we haven't actually been able to test over and while we have every reason to believe our solutions will work - they might not.