Objective
KNOWLEDGE OF THE POTENTIAL MIGRATION BEHAVIOUR OF RADIONUCLIDES FROM REPOSITORIES IN DEEP GEOLOGICAL FORMATIONS IN A PREREQUISITE FOR THE SAFETY ANALYSES OF THE ENTIRE DISPOSAL SCHEME. IT REQUIRES DETAILED INFORMATION ABOUT GEOCHEMICAL PROCESSES AND REACTIONS WHICH MAY BE IMPORTANT IF A GIVEN RADIONUCLIDE IS RELEASED AND MIGRATES FROM THE DISPOSAL SITE. THUS, MUCH OF THE RESEARCH WICH HAS TO BE UNDERTAKEN CONCENTRATES ON THE GEOCHEMISTRY OF SELECTED ELEMENTS. THESE INVESTIGATIONS ARE USUALLY PERFORMED AS LABORATORY BATCH, COLUMN AND DIFFUSION TESTS. THE EXPERIMENTAL CONDITIONS CAN THEN BE STRICTLY CONTROLLED AND VARIED WITH RESPECT TO A NUMBER OF CHEMICAL AND PHYSICO-CHEMICAL EFFECTS.
THE OBJECTIVES OF THIS WORK ARE TO CONTRIBUTE TO A BETTER UNDERSTANDING OF THE TRANSPORT BEHAVIOUR OF ACTINIDES AS WELL AS TO PRESENT A CRITICAL REVIEW OF THE DIFFERENT LABORATORY TECHNIQUES USED IN MIGRATION STUDIES. THE EXPERIMENTAL WORK IS FOCUSED ON THE RADIOISOTOPES OF TC, EU, PU AND INVESTIGATES THE ESSENTIAL INFLUENCES ON THE TRANSPORT BEHAVIOUR AND WHICH ARE EXERTED BY REDOX CONDITIONS, THE FORMATION OF COMPLEXES WITH NATURAL HUMIC AND FULVIC ACIDS AS WELL AS THE FORMATION AND/OR PRESENCE OF COLLOIDS.
IN THE INITIAL STAGE OF THE PROJECT SAMPLES FROM THE GORLEBEN SITE, THE PLANNED GERMAN REPOSITORY, ARE UNDER INVESTIGATION.
1. THE WORK WAS STARTED WITH A LITERATURE STUDY OF SORPTION DATA OBTAINED FROM VARIOUS EXPERIMENTAL TECHNIQUES IN COMPARISON WITH OWN RESULTS AND PREVIOUS EXPERIENCE.
2.1 SANDY AND CLAY SEDIMENTS AND CORRESPONDING GROUNDWATER SAMPLES FROM GORLEBEN WITH EXTENSIVE MINERALOGICAL, CHEMICAL AND PHYSICAL CHARACTERISATION WERE SELECTED.
2.2 SORPTION DATA WERE OBTAINED BY BATCH AND DIFFUSION PROCEDURES WITH SPECIAL EFFORTS TO STANDARDIZE EXPERIMENTAL TECHNIQUES (E.G. PRECONDITIONING, PHASE SEPARATION).
2.3 KINETIC AND EQUILIBRIUM EXPERIMENTS WERE STARTED WITH TC, EU, PU. IN ADDITION SR (SIMPLE CHEMISM) AND ZR/NB (COMPLEX/COLLOID FORMING PROPERTIES) WERE INVESTIGATED.
2.3.1 TO ASSESS THE INFLUENCE OF DIFFERENT EH CONDITIONS ON THE MOBILITY OF TC, BATCH AND DIFFUSION TESTS ARE CARRIED OUT USING REPRESENTATIVE SAMPLES FROM GORLEBEN.
2.3.2 EFFECTS OF NUCLIDE SORPTION ON COLLOIDS AND COLLOID FORMATION FOR DIFFUSION AND SORPTION DATA ARE TESTED WITH TRI- AND TETRAVALENT IONS (EU3+, ZR4+).
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences earth and related environmental sciences geochemistry
- humanities languages and literature literature studies
- natural sciences physical sciences condensed matter physics soft matter physics
- natural sciences chemical sciences nuclear chemistry radiation chemistry
You need to log in or register to use this function
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
85764 NEUHERBERG
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.