The uranium source-term mineralogy and geochemistry at the Broubster natural analogue site, Caithness
It is important to test applications of the CHEMVAL thermodynamic database and transport codes such as CHEMTARD with real geological situations in order to create confidence in their use as predictors of radionuclide transport in performance assessments of radioactive waste repositories. To this end the British Geological Survey has been conducting a number of investigations of locations where natural analogues of radionuclide migration can be recognised, with the purpose of describing the processes of movement of uranium, thorium and rare earth elements in sediments. In this way, data can be compiled for modelling and testing the inherent ideas in the codes. The uranium mineralisation at the Broubster Natural Analogue site presents an easily accessible locality suitable for such a study with the emphasis on the role of organics in the transport and fixation of uranium. This report concentrates on the mineralogical aspects of the primary uranium mineralisation or "source-term" from which uranium has been mobilised. It compiles new results and presents a comprehensive information base for modelling aqueous uranium speciation and transport.
Bibliographic Reference: EUR 13280 EN (1991) 50 pp., FS, ECU 6.25
ISBN: ISBN 92-826-2420-X
Record Number: 199110550 / Last updated on: 1994-12-02
Original language: en
Available languages: en