The magazine describes Onkalo as the nuclear-waste disposal site in Eurajoki. The film shows full-scale models of the disposal canister and explains the protection one layer at a time.
Fuel is closed in a canister built from a cast-iron inner part and a copper outer shell. Bentonite is placed around that canister. The tunnels are filled with clay as well, and a reinforced-concrete plug is installed at the end. The account says the aim of this sequence is to isolate the spent fuel from the environment.
A related headline on the same page, dated 3 October 2026, says Finland will soon make history at a depth of 400 metres when the world's first spent-fuel disposal canister is lowered into Onkalo at Olkiluoto.
The report shows the barrier sequence planned for spent fuel at Onkalo, while a companion headline says the world's first canister is soon to be lowered.
The story so far — Onkalo
- August 20, 2026 Finland's Onkalo Repository Passes Key Safety Ruling
- October 4, 2026 Finnish magazine films spent-fuel disposal modelled past 400 metres this story
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