TVO-92 safety analysis of spent fuel disposal

Timo Vieno, Aimo Hautojärvi, Lasse Koskinen, Henrik Nordman

Research output: Book/ReportReport


The spent fuel from the TVO I and TVO II reactors at the Olkiluoto nuclear power plant is planned to be disposed in a repository constructed at a depth of about 500 meters in crystalline bedrock. Teollisuuden Voima Oy (TVO) has carried out preliminary site investigations for spent fuel disposal between 1987 and 1992 at five areas in Finland (Olkiluoto, Kivetty, Romuvaara, Syyry and Veitsivaara). The Safety analysis of the disposal system is presented in the report. Spent fuel will be encapsulated in composite copper-steel canisters. The canister design (ACP canister) consists of an inner container of steel as a load-bearing element and an outer container of oxygen-free copper to provide a shield against corrosion. In the repository the canisters will be emplaced in vertical holes drilled in the floors of horizontal deposition tunnels. The annulus between the canister and the rock is filled with compacted bentonite. The results of the safety analysis attest that the planned disposal system fulfils the safety requirements. Suitable places for the repository can be found at each of the five investigation sites.
Original languageEnglish
Place of PublicationHelsinki
Number of pages269
Publication statusPublished - 1993
MoE publication typeD4 Published development or research report or study

Publication series

SeriesYJT Report

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    Vieno, T., Hautojärvi, A., Koskinen, L., & Nordman, H. (1993). TVO-92 safety analysis of spent fuel disposal. YJT Report, Vol.. 92-33E