The popular YouTube channel The B1M has an interesting video on how Finland is tackling nuclear waste:
Finland might have solved nuclear power's biggest problem (2021): https://www.youtube.com/watch?v=kYpiK3W-g_0
And even after all that it's still far less expensive than remediating coal output.
Hoping to know enough and for sure about all this is... a hope.
Stating that we know what our descendants will need/do in a so distant future is even more funny.
They "considered" such facts using a somewhat light approach: 'Bob Loux, the executive director of the Nevada Agency for Nuclear Projects, expressed amazement that the US Department of Energy had only just carried out the "11th hour" drilling tests.
"It certainly looks like DoE has encountered a surprise out there, and it certainly speaks to the fact they haven't done the technical work they should have done years ago," he told the paper.
"It's going to have to cause some change of the design in the final analysis. It's going to impact the safety case."'
Oops...
They also "considered" those metal containers as adequate during the 1990's, then... (what, you think "they" are omniscient?)... problems related to brines and high temperature arose...
https://www.nwtrb.gov/docs/default-source/board/mrs_duquette...
https://www.nrc.gov/docs/ML0335/ML033500420.pdf
Oops...