4 points
2 points
Or much much longer. It’s not going anywhere. It can’t escape its cask, and outside human intervention the casks won’t be breached. It’s just locked-up metal that gives off some radiation, fully contained within the cask. It isn’t oozing green goo.
2 points
outside human intervention the casks won’t be breached
Unless due to tectonic activity…
2 points