Sweden keeps its radioactive operational waste SKB’s Final Repository for Short-Lived Radioactive Waste is located at Forsmark in the municipality of Östhammar. The facility started operating in 1988 and was then the first of its kind in the world. The radioactive waste deposited in the SFR is low and medium level waste. This means that unlike spent nuclear fuel it does not have to be cooled and is relatively short-lived. The SFR is situated 50 metres below the bottom of the Baltic and comprises four 160-metre long rock vaults and a chamber in the bedrock with a 50-metre high concrete silo for the most radioactive waste. Two parallel kilometre-long access tunnels link the facility to the surface.
Except from http://www.skb.com/our-operations/sfr/