TVO-92 safety analysis of spent fuel disposal

Timo Vieno, Aimo Hautojärvi, Lasse Koskinen, Henrik Nordman, J.P. Salo

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Spent fuel from the TVO I and TVO II reactors is planned to be disposed of in a repository to be constructed at a depth of about 500 meters in crystalline bedrock. The fuel will be encapsulated in composite copper and steel canisters. Preliminary site investigations have been carried out between 1987 and 1992 at five sites. If the conditions in the geosphere in the vicinity of the repository do not change drastically and if no major disruptive event hits the repository, the copper-steel canisters remain intact for millions of years and no significant amount of radioactive substances will ever escape from the repository. The spent fuel, the buffer and the geosphere restrict efficiently the release of radionuclides even if the canister is initially defective or is broken soon after the sealing of the repository. The results of the safety analysis attest that the planned disposal system fulfills the safety requirements. Suitable places for the repository can be found at each of the five investigation sites. It is important to characterize in detail the site where the repository will be located, so that fracture zones can be taken into consideration when constructing the repository.
Original languageEnglish
Title of host publicationHigh Level Radioactive Waste Management
Subtitle of host publicationProceedings
Place of PublicationLa Grange Park
PublisherAmerican Nuclear Society (ANS)
Publication statusPublished - 1993
MoE publication typeA4 Article in a conference publication
EventHigh Level Radioactive Waste Management (HLRWM) - Las Vegas, United States
Duration: 26 Apr 199330 Apr 1993


ConferenceHigh Level Radioactive Waste Management (HLRWM)
CountryUnited States
CityLas Vegas

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