Objectif Dam constructions represent an essential component of the multi-barrier safety concept for a repository for radioactive waste in salt formations. Within the scope of the dam project the long-term seal, which is responsible for the long-term safety of a dam construction is subjected to an in situ test. Main objectives of the scientific investigation programme are:- to provide proof of the tightness of the long-term seal as a dam construction component by means of experimental investigations to obtain essential data concerning the effectiveness and - to prognosticate its functioning (tightness) over long time periods (up to approximately 500 years) via model calculations.The long-term evolution of permeability and porosity will be considered, investigating the chemical stability and the petrophysical behaviour.The state of the art on calculations and codes for multiple-phase flow will be analyzed, adequate mathematical models and computer codes developed and verified. [N.B. In December 1992 the BMFT (D) decided to have the project reviewed; in-situ experiments were suspended].Dam constructions represent an essential component of the multibarrier safety concept for a respository for radioactive waste in salt formations. Within the scope of the dam project, the long term seal, which is responsible for the long term safety of a dam construction, is subjected to an in situ test. Main objectives of the scientific investigation programme are to provide proof of the tightness of the long term seal as a dam construction component by means of experimental investigations to obtain essential data concerning the effectiveness, and to prognosticate its functioning (tightness) over long time periods (up to approximately 500 years) via model calculations.In order to collect geochemical data, the physicochemical and petrophysical characteristics of the component of the long term seal were investigated. The solubility of materials in fresh water and brine have been measured and laboratory dynamic experiments with laboratory percolation test through different assemblages of briquettes have been performed. The design of the pilot test has been finished and the preparation of the testfield is going on. In the field of geochemical and petrophysical modelling, an overview of the development of recent geochemical model on application on thermodynamic codes are performed. Considering modelling of petrophysical characteristics of briquettes assemblages, a review on dissolution of solid and porous materials by fluids was achieved. A literature study for analyzing state of the art calculations and codes for multiple phase flow has been done. It has been proven that a large number of codes deal with topics strongly related to the hydromechanical behaviour of salts.Work programme:DBE and GSFI/1 Conception, numerical preliminary investigations and detailed planning of the long-term seal test in the Asse MineI/2 Preliminary and parallel laboratory and in situ (borehole) testsI/3 Instrumentation of the long-term seal constructionI/4 Performance of the large scale test long-term seal with gas and brineI/5 Evaluation of the test resultsI/6 Hydraulic modellingANDRAII/1 Physicochemical and petrophysical characterizationII/2 Evaluation of the solubility of materialsII/3 Dissolution kineticsII/4 Laboratory batch experimentsII/5 Laboratory open system experimentII/6 Pilot study in mine gallery (Amélie Mine)II/7 Geochemical modellingII/8 Petrophysical modellingII/9 Interpretation and final modelling of the coupled systemENRESAIII/1 Analysis of the state-of-the-art on calculations & codes for multiple-phase flowIII/2 Conceiving laboratory experiments for measuring the permeability of the long-term seal against brineIII/3 Development of adequate mathematical models and computer codes for the numerical simulation of multiple-phase flowIII/4 Code verificationIII/5 Interpretation of the in-situ test measurements using the developed codes Champ scientifique engineering and technologyother engineering and technologiesnuclear engineeringnuclear waste managementhumanitieslanguages and literatureliterature studiesnatural sciencesmathematicsapplied mathematicsmathematical model Programme(s) FP2-RADWASTOM 4C - Specific research and technical development programme (Euratom) in the field of management and storage of radioactive waste, 1990-1994 Thème(s) B.1 - The underground facility in the Asse Salt Mine (FRG) Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur DEUTSCHE GESELLSCHAFT ZUM BAU UND BETRIEB VON ENDLAGERN FUER ABFALLSTOFFE MBH Contribution de l’UE Aucune donnée Adresse Woltorfer Strasse 74 31224 PEINE Allemagne Voir sur la carte Coût total Aucune donnée Participants (3) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire EMPRESA NACIONAL DE RESIDUOS RADIOACTIVOS S.A. Espagne Contribution de l’UE Aucune donnée Adresse 7,Emilio Vargas 7 28043 MADRID Voir sur la carte Coût total Aucune donnée GSF - FORSCHUNGSZENTRUM FUER UMWELT UND GESUNDHEIT GMBH Allemagne Contribution de l’UE Aucune donnée Adresse Ingolstaedter Landstrasse 1 85764 NEUHERBERG Voir sur la carte Liens Site web Opens in new window Coût total Aucune donnée NATIONAL RADIOACTIVE WASTE MANAGEMENT AGENCY OF FRANCE France Contribution de l’UE Aucune donnée Adresse Rue Jean Monnet 1-7 92298 CHATENAY MALABRY Voir sur la carte Coût total Aucune donnée
