Concept and safety assessment for final disposal of spent nuclear fuel in Finland

Esko Peltonen, Veijo Ryhänen, Jukka-Pekka Salo, Timo Vieno, Seppo Vuori

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

The current obligations and long term plans for management of spent nuclear fuel are presented. The use of safety analysis in respository development and site selection is discussed on the basis of the analyses performed. The general principle for final disposal of spent fuel in Finland is a multibarrier system. The spent fuel assemblies are assumed to be enclosed in copper canisters which will be emplaced in boreholes in the floors of disposal tunnels and surrounded by buffer material. The final repository is assumed to be built at a depth of 500 m in the bedrock. Safety analysis, based on system models consisting of repository, geosphere and biosphere modules, was carried out employing the scenario technique. The choice of scenarios was based on a comprehensive analysis of anticipated situations as well as disturbed evolution and disruptive events with low probabilities. The conservative analyses indicate that the disposal concept easily meets the safety objectives proposed by international organizations. Owing to the high safety margins optimization of the engineered barrier system can be considered in the future.
Original languageEnglish
Title of host publicationInternational symposium on the siting, design and construction of underground repositories for radioactive wastes
Place of PublicationVienna
PublisherInternational Atomic Energy Agency IAEA
Pages611-624
ISBN (Print)92-0-020286-1
Publication statusPublished - 1986
MoE publication typeB3 Non-refereed article in conference proceedings
EventInternational symposium on the siting, design and construction of underground repositories for radioactive wastes - Hannover, Germany
Duration: 3 Mar 19867 Mar 1986

Publication series

SeriesIAEA Proceedings
NumberIAEA-SM--289/28
ISSN0074-1884

Conference

ConferenceInternational symposium on the siting, design and construction of underground repositories for radioactive wastes
Country/TerritoryGermany
CityHannover
Period3/03/867/03/86

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