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/
500m is the industry standard depth for deep geological repositories for nuclear waste