Accumulation in the overburden of radionuclides from a leaking nuclear waste repository
2008 (English)In: American Nuclear Society - 12th International High-Level Radioactive Waste Management Conference 2008, 2008, 473-478 p.Conference paper (Refereed)
The spatial distribution of possible discharge areas of radionuclides originating from repositories of high level radioactive nuclear waste was assessed. This was done by using a 3-D transport model. The results indicate "hot-spots" in the landscape where the radionuclides most likely emerge. These hot-spots are highly related to the hydrological network consisting of streams, lakes and wetlands. The geological factors creating this pattern as well as the characteristics that distinguish these areas from others were investigated. Our result suggests that these hot-spots occur in low elevation areas where the quaternary deposits are significantly greater than the average thickness in the area. The most important factors for the locations of the hot-spots are landscape topography and fracture distribution in the bedrock. As a result of the relationship between, fracture zones, topography and streams, the importance of the topography for the discharge area distribution is not contradicted by the heterogeneity in the bedrock as long as the undulation of the groundwater surface is not extremely small. Due to the similarities within deep groundwater discharge areas, one can make site-specific analyses in one area, which have a broad applicability for migration of radionuclides originating from a nuclear waste repository.
Place, publisher, year, edition, pages
2008. 473-478 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-84938ScopusID: 2-s2.0-70449130236ISBN: 978-0-89448-062-1OAI: oai:DiVA.org:kth-84938DiVA: diva2:499683
12th International High-Level Radioactive Waste Management Conference 2008; Las Vegas, NV; 7 September 2008 through 11 September 2008
QC 201203022012-02-132012-02-132012-03-02Bibliographically approved