this post was submitted on 13 Sep 2023
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97% of the waste produced from non-breeder reactors is what’s classified as low-level or intermediate-level waste. The low-level waste in particular is only dangerous for a few decades to a century on the outside. The containers for anything more hazardous (the ‘Type B’ casks) have never seen an accident which have breached it, and are designed to exist in pristine condition for over a thousand years without maintenance.
Modern disposal techniques of the Intermediate-level and high-level waste also includes vitrification. This involves embedding the waste within molten glass, which is incredibly resilient to environmental conditions over several millennia.