Objetivo The objective of the project is the characterisation of natural radionuclide (U, Th and their decay products) migration processes in a fractured granitic environment and validation of models describing these processes.In situ studies will be developed at the "El Berrocal" site, a post-tectonic batholith, taking into account:- The characteristics of the rock fissures and discontinuities- The hydrodynamic and hydrogeological conditions, and- The variation of the physico-chemical characteristics with depth.In parallel to these in situ activities, a series of laboratory experiments have been planned to study the same phenomena under controlled conditions.Finally, the identified processes will be modelled and validated.The objective of the project is the characterization of natural radionuclide (uranium, Thallium and their desintegration products) migration processes in a fractured granitic environment and validation of models describing these processes. In situ studies will be developed at the El Berrocal site, a post tectonic batholith, taking into account the characteristics of the rock fissures and discontinuities, the hydrodynamic and hydrogeological conditions, and the variation of the physico-chemical characteristics with depth. In parallel to these in situ activities, a series of laboratory experiments have been planned to study the same phenomena under controlled conditions. Finally, the identified processes will be modelled and validated.Overall project objectives were reviewed and agreed and a set of interim objectives developed, directly related to the needs of safety assessments for radioactive waste disposal systems.An integrated programme of field and laboratory work at the site was developed; this programme will serve as a useful Project management tool and will help ensure needed co-ordination takes place.Basic geological and geophysical mapping of the site has been completed.A preliminary set of conceptual models for groundwater flow at the site has been developed on the basis of available geological and hydrological information.80% of the drilling programme has been completed.The delays in the drilling programme have afforded the opportunity for a detailed review of borehole locations and borehole management to ensure that appropriate information is collected, which will meet the needs of all participating organisations.Preliminary sampling for hydrochemical studies for ionic and colloidal phases has been completed in boreholes.Altered granite associated with the same fracture system has been sampled at 7 locations in the access gallery and mineralogical and geochemical analyses conducted. This work will provide information on the mineralogic al and spatial distribution of uranium in the rock and in the hydrothermal alteration processes that have occurred.Work programme: I. Characterization of the physical environment: Geotectonic characterisation from the surface. Underground characterisation from boreholes. Geochemical and petrographic fissural filling studies. Litho-structural model of the site.II. Geochemical characterisation: Hydrogeochemistry (physicochemical and ionic phases). Groundwater colloidal phases studies (sampling, characterisation and transport). Groundwater mixing and circulation patterns. Fissure filling characterization. Hydrothermal and weathered transformations.III. Migration studies: Natural radionuclide distribution.Mobilization/retention processes (laboratory). In situ migration experiments.IV. Hydrogeological characterisation: Assessment of borehole conditions. Design and construct wirelines straddle packer testing system. Transmissivity and head measurements. Define numerical models. Design crosshole interference tests in selected fractured zones.V. Modelling studies: Development of computer code (flow and transport, 2-D fractures in 3-D medium). Prediction of uncertainties caused by spatial heterogeneity. Flow and solute transport in a single fracture. Ámbito científico engineering and technologyother engineering and technologiesnuclear engineeringnuclear waste managementengineering and technologyenvironmental engineeringwaste managementnatural sciencesearth and related environmental scienceshydrologyhydrogeologynatural scienceschemical sciencesinorganic chemistrypost-transition metalsnatural scienceschemical sciencesnuclear chemistryradiation chemistry Programa(s) FP2-RADWASTOM 4C - Specific research and technical development programme (Euratom) in the field of management and storage of radioactive waste, 1990-1994 Tema(s) A.4.3 - Radionuclide migration in the geosphere Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador Empresa Nacional de Residuos Radioactivos SA Aportación de la UE Sin datos Dirección 7,Emilio Vargas 28043 Madrid España Ver en el mapa Coste total Sin datos Participantes (5) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo COMMISSARIAT A L'ENERGIE ATOMIQUE Francia Aportación de la UE Sin datos Dirección Avenue du General Leclerc 60-68 92265 FONTENAY AUX ROSES Ver en el mapa Coste total Sin datos Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas España Aportación de la UE Sin datos Dirección 22,Avenida Complutense 28040 Madrid Ver en el mapa Coste total Sin datos INTERNATIONAL CENTRE FOR NUMERICAL METHODS IN ENGINEERING España Aportación de la UE Sin datos Dirección S/N,Gran Capitan s/n, Campus Norte, Edificio C1 08034 BARCELONA Ver en el mapa Coste total Sin datos NERC British Geological Survey Reino Unido Aportación de la UE Sin datos Dirección Nicker Hill NG12 5GG Keyworth Ver en el mapa Coste total Sin datos United Kingdom Atomic Energy Authority (UKAEA) Reino Unido Aportación de la UE Sin datos Dirección Harwell Laboratory OX11 0RA Didcot Ver en el mapa Coste total Sin datos