Title: A Micro-Scale Random-Walk Model for Radionuclide Migration Based on Image Analysis-Derived Modelling Grids
Authors: FALCK WolfgangVOKAL Vratko
Citation: COMPUTERS & GEOSCIENCES vol. 36 no. 1 p. 71-82
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2010
JRC N°: JRC48404
ISSN: 0098-3004
URI: http://www.elsevier.com/locate/cageo
http://publications.jrc.ec.europa.eu/repository/handle/JRC48404
DOI: 10.1016/j.cageo.2009.02.011
Type: Articles in periodicals and books
Abstract: This report describes the development of a random-walk transport model for the migration of radionuclides hardrocks at the grain scale. The physics of diffusion are reviewed and it is described how they are translated into the model algorithm. Further, the algorithm for recognising solid grain boundaries during the migration step is discussed. The model grid is derived from the analysis of images obtained by optical microphotography and from autoradiography of hardrock samples impregnated with tritium-marked resins. Sample calculations for tracer transport cases and simple reaction, i.e. precipitation cases are presented.
JRC Directorate:Energy, Transport and Climate

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