Posiva is an Expert Organisation in Nuclear Waste Management
Posiva Oy is an expert organisation responsible for the final
disposal of spent nuclear fuel of the owners.
Posiva has been
established in 1995.
Posiva Oy is an expert organisation responsible for the final
disposal of spent nuclear fuel of the owners.
Posiva has been
established in 1995.
28.10.2019 Encapsulation plant’s friction stir welding system to be supplied by Bond Technologies
Posiva is acquiring a friction stir welding system for sealing disposal canister copper lids from US Company Bond Technologies.
New encapsulation plant ceremony brought glamour and glitz to Olkiluoto
There was the festive feeling of a major sports event in the air on Monday 23 September at the ONKALO® site in Olkiluoto as the foundation stone of Posiva’s encapsulation plant was laid. The government’s address during the ceremony was brought by Prime Minister Antti Rinne. Posiva's major stakeholders and media were also present at the festive ceremony.
Copper endures the anoxic conditions deep inside the bedrock and will not corrode. There have been findings in the natural environment of metallic copper which is many millions of years old and it has retained good protective characteristics.
The final
disposal of spent nuclear fuel is intended to begin in 2022.
At the
moment, the spent nuclear fuel is stored in water basins in interim storage
facilities at the Olkiluoto and Loviisa power plants. The water cools down the
fuel assemblies and provides protection against radiation.
According to existing plans, the Loviisa 1–2, Olkiluoto 1–2 and Olkiluoto 3 plant units will produce electricity for 50–60 years. Production results in about 5,500 tonnes of spent fuel. In addition, the operation of the planned Olkiluoto 4 unit for 60 years will increase the total amount of spent fuel up to 9,000 uranium tonnes.
The final disposal of spent fuel from the existing nuclear power plant units and the Olkiluoto 3 unit currently under construction will take about 100 years.
Yes. In the past, ice ages have been regular events and they are expected to also occur in the future. As a result, ice age conditions will be taken into account when planning the final disposal. Posiva carries out research in Greenland in permafrost conditions.
