Article : Impact of repository depth on residence times for leaking radionuclides in land-based surface water
Authors : Rowiński, P.Institute of Geophysics, Polish Academy of Sciences, Księcia Janusza 64, 01-452 Warszawa, Poland, email@example.com, Nikora, V.Engineering Department, University of Aberdeen, King’s College, Scotland, UK, firstname.lastname@example.org, Majewski, W.Institute of Meteorology and Water Management, ul. Podleśna 61, 01-673 Warszawa, Poland, Wojciech_Majewski@imgw.pl, Aberle, J.Leichtweiss-Institute for Hydraulic Engineering, Technical University of Braunschweig, Beethovenstr. 51, 38106 Braunschweig, Germany, email@example.com, Dittrich, A.Leichtweiss-Institut of Hydraulic Engineering (LWI), Department of Hydraulic Engineering, Beethovenstrasse 51a, 38106 Braunschweig, Germany, firstname.lastname@example.org, Brovchenko, I.Ukrainian Center of Environmental and Water Projects Glushkova Prospect 42, 03187, Kiev, Ukraine, email@example.com, Demchenko, N.Atlantic Branch of P.P. Shirshov Institute of Oceanology Russian Academy of Sciences Prospect Mira 1, 236000 Kaliningrad, Russia, firstname.lastname@example.org, Néelz, S.Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, UK, email@example.com, Wörman, A.Environmental Physics Group, Swedish University of Agricultural Sciences, Uppsala, Sweden, firstname.lastname@example.org,
Abstract : The multiple scales of landscape topography produce a wide distribution of groundwater circulation cells that control the hydro-geological environments surrounding geological repositories for nuclear waste. The largest circulation cells tend to discharge water into major river reaches, large freshwater systems or the nearby Baltic Sea. We investigated numerically the release of radionuclides from repositories placed in bedrock with depths between 100 to 2000 meters in a Swedish coastal area and found that leakage from the deeper positions emerges primarily in the major aquatic systems. In effect, radionuclides from the deeper repositories are more rapidly transported towards the Sea by the stream system compared to leakage from more shallow repositories. The release from the shallower repositories is significantly retained in the initial stage of the transport in the (superficial) landscape because the discharge occurs in or near low-order streams with high retention characteristics. This retention and residence time for radioactivity in the landscape control radiological doses to biota and can, thus, be expected to constitute an essential part of an associated risk evaluation.
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Qute : Rowiński, P. ,Nikora, V. ,Majewski, W. ,Aberle, J. ,Dittrich, A. ,Brovchenko, I. ,Demchenko, N. ,Néelz, S. ,Wörman, A. ,Wörman, A. , Impact of repository depth on residence times for leaking radionuclides in land-based surface water. Acta Geophysica Vol. 55, no. 1/2007