These tunnels are designed for 100,000 years

Solutions are already being made for spent nuclear fuel, no reason why that wouldn't apply in this scenario. In fact its massive overkill for this particular situation but still an option if its needed: ▶ this video

I've been binge watching Tom Scott videos after finding out he's quasi-retiring soon and just happened to have watched his video of the exact same project last night: ▶ this video

Tom Scott has a great video[0] about the Onkalo spent nuclear fuel repository in Finland[1], in which he talks about one of the reasons that they decided on the particular area - why would anyone dig there? Skip to 4:29 in the video for the relevant info. [0]: ▶ this video [1]: link

In Finland they are already filling up a 100k year long term storage mine [1]. Will every country with nuclear power have to find and dig (and counter-NIMBY) their own mines or could those with more favorable geological features offer theirs to others? Earthquake-prone Japan might have a hard time finding an appropriate location. 1: 6m Tom Scott video ▶ this video

Yes, I was really disheartened when I learned that my city only recycles a few types of plastic, and most of it just goes to the landfill. And now its being theorized that oil industries encouraged recycling as a solution, even knowing its deficiencies, so that plastics would be more readily accepted. Regarding nuclear waste disposal, this is the coolest solution I've seen so far: - ▶ this video