There is a beautiful, somewhat depressing Danish documentary about this issue called Into Eternity (2010) [1] (it's also on YouTube [2]), about the Finnish nuclear reactions at Onkalo.
They faced the exact same problem as in the U.S. about how to store the waste safely and warn future generations about the dangers of accessing the waste.
They faced the exact same problem as in the U.S. about how to store the waste safely and warn future generations about the dangers of accessing the waste.
[1] https://en.wikipedia.org/wiki/Into_Eternity_(film)
[2] https://youtu.be/ayLxB9fV2y4?si=4VoMTuV6aWTzpquA