Because we appear to have no sense of proportion, or trade-offs.
1) has lost all records of current generations
2) doesn't know about nuclear waste disposal sites and radioactivity
3) is still advanced enough to dig several hundred meters into hard rock
4) for no discernible reason digs up the entire waste disposal site and then what? contaminates their excavation crew?
Doesn't seem impossible. Just see how much trouble we have understanding writing systems from 8000 BCE.
You only need a few generation of lost ability to read/write for solid documentation of nuclear waste and radioactivity to turn into myth at best. This does not seem unlikely over a duration of 10000y. Such a myth may be just enough for people to seek out a dangerous place without understanding the danger.
Yes.
See The art of the 10,000-year warning[1] and the full Preservation of Records, Knowledge and Memory Across Generations report[2].
Other proposed solutions include: the breeding of so-called "radiation cats" or "ray cats". Cats have a long history of cohabitation with humans, and this approach assumes that their domestication will continue indefinitely. These radiation cats would change significantly in color when they came near radioactive emissions and serve as living indicators of danger.[3]
[1] https://www.ans.org/news/article-416/the-art-of-the-10000yea...
[2] https://www.oecd-nea.org/jcms/pl_15088
[3] https://en.wikipedia.org/wiki/Long-term_nuclear_waste_warnin...
The more dangerous stuff burns itself out quickly (short half-life), and the longer-lasting stuff is not very dangerous given the type of radiation it is and can be blocked quite easily
So, probably bury it deep enough with little external sign that it's actually there, and if it is actually discovered it won't be that big of a deal:
> The main concern associated with spent nuclear fuel – radioactivity – diminishes with time.
> About 40 years after it's done making power, the heat and radioactivity of the fuel bundle will have fallen by over 99%.
* https://twitter.com/MadiHilly/status/1550148416881180674
> About three containers are needed to store the quantity of fuel that is removed each 12-24 months; the space taken up by even a 60 year plant life is less than is needed for a Wal-Mart even without any efforts to efficiently stack the containers.
* https://atomicinsights.com/time-for-plan-b-yucca-mountain-pr...
Long term thinking > Short term thinking > Extreme long term thinking.
Please, let us know your plan.
P.S. This is not a hypothetical problem, like the demands you are making of nuclear. This is a current and ongoing one. Your green energy isn't as green as you claim it is, please tell us your solution.
Besides, nuclear fuel dumps are few and far between, and easily avoided once identified. I'm touched that you care so much about a few individual lives 10,000 years from now, but we've got millions if not billions of lives to worry about in this century.
But they will learn eventually after a couple of deaths, as we did every single time. We are trying to solve the wrong problem here; Is the population what counts.