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VDH – a case of ostrich philosophy or a serious alternative for the disposal of highly radioactive waste?
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-1365-8552
2014 (English)In: Waste Management and the Environment VII / [ed] C.A. Brebbia; G. Passerini; H. Itoh, Southampton: WIT Press, 2014, p. 377-390Conference paper, Published paper (Refereed)
Abstract [en]

Two basically different concepts for disposal of highly radioactive waste are the often cited KBS-3 method implying isolation of such waste in copper canisters in short holes bored from tunnels at a depth of a few hundred meters, and disposal in the lower part of 4 km deep holes (VDH). The deep hole concept has the advantage that the waste packages will be located in very salt, stagnant groundwater in rock that is much less permeable than shallow rock with repositories of KBS-3V type. Disadvantages are that some of the techniques for installation have not yet been demonstrated and that retrieval of damaged or stuck canisters is deemed more difficult than for KBS-3V. Both concepts require precise adaption of canister and seal positions to the rock structure, which, for KBS-3 repositories, is not known until the tunnels have been constructed. For VDH, pilot borings provide such knowledge at low cost at a very early stage. The deep holes need to be supported by casings and all work deeper than 500 m must be made with clay mud in them. Reconsideration of the design and function of VDH shows that it has significant advantages, primarily respecting cost and construction time, and that new types of concrete for sealing purposes can make such repositories safer than KBS-3V disposal since seismic and tectonic events are less detrimental and future glaciations will cause much less disturbance. The most important value is that the groundwater that can possibly become contaminated by failing engineered barriers will stay at more than 2000 m depth and that there is no mechanism that can bring it up to the biosphere

Place, publisher, year, edition, pages
Southampton: WIT Press, 2014. p. 377-390
Series
WIT Transactions on Ecology and the Environment, ISSN 1743-3541 ; 180
National Category
Infrastructure Engineering Geotechnical Engineering
Research subject
Structural Engineering; Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-30069DOI: 10.2495/WM140331Local ID: 3c489a84-2186-4794-a856-68e4fab8a3d0ISBN: 978-1-84564-760-5 (print)ISBN: 978-1-84564-761-2 (electronic)OAI: oai:DiVA.org:ltu-30069DiVA, id: diva2:1003296
Conference
International conference on Waste Management and the Environment : 12/05/2014 - 14/05/2014
Note
Godkänd; 2014; 20140313 (mohhat)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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