Lindsay Krall

Lindsay_Krall_hq1I am a doctoral student in geological science at Stockholm University, supported within MetTrans by the Swedish Nuclear Fuel and Waste Management Co. (SKB) and the Swedish Museum of Natural History.  In general, I am interested in the geological aspects of the sustainable implementation of nuclear energy, including the world’s U and Th resource and the geologic disposal of spent nuclear fuel (SNF).  In Sweden, SNF is predominantly comprised of UO2+x.  Currently, I am conducting a field investigation into redox history and mobility of natural U within the fractured crystalline bedrock at Forsmark, Sweden.  This is of local relevance because the site currently hosts a repository for low- and intermediate-level waste and has been proposed to host a deep geological repository for SNF.  Within the investigation, U minerals and U/Th series isotopes are applied as tracers of water-U mineral interaction.  In-situ methods of U mineral characterization include optical petrography, SEM-EDS, and EMPA, in addition to SIMS and LA-ICP-MS.  Groundwater investigations include the application of U-series disequilibrium, notably through the measurement and modelling of Ra-isotopes.  Combined with hydrochemical modelling, it is expected that this multi-stage study will contribute to an understanding of the local mobility of natural U and its radiogenic daughters on a range of time-scales relevant to that of a radioactive waste repository.

Publications:

Krall L., Sandström B., Tullborg E-L, & Evins L.Z.  Natural uranium in Forsmark, Sweden: The solid phase.  Applied Geochemistry, 59 (2015), pp 178-188.