Sweden started building a final storage facility for spent nuclear fuel on Wednesday, only the second such site in the world, where highly radioactive waste will be stored for 100,000 years.
Archived version: https://web.archive.org/web/20250116073617/https://www.arctictoday.com/sweden-starts-building-100000-year-storage-site-for-spent-nuclear-fuel/
Are 500 meters deep enough?
I mean, really the only thing that’s gonna expose them is plate tectonics. Just to give a sense of scale, America and Europe are diverging by 4 cm/yr, so will be 500 metres farther from each other, horizontally, in about 10,000 years. Geologically stable regions (called cratons) would not experience such motion vertically for much, much, much longer.
500m is the industry standard depth for deep geological repositories for nuclear waste
But is that enough? I rarely trust industry standards.