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Safe nuclear fuel repository


experimental research in glove box simulating repository conditionsCustomer: Posiva Oy


 Creation of safe, practical and cost-effective design for Finnish spent nuclear fuel repository.


VTT is an essential contributor to the technical bases of the ONKALO repository safety case, including waste characterization methods, justification for long-term safety and development and performance verification of engineering barrier systems for confinement of radioactive materials.


As the first country in the world, Finland has a safe final disposal solution for high-level radioactive waste from nuclear power plants. The construction license of a deep, geological repository in Olkiluoto was granted to Posiva Oy by the Finnish Government’s Council of State on 9 November 2015. Waste deposition is expected to start in 2022.