Radionuclide Retention in Geologic Media [electronic resource]: Workshop Proceedings - Oskarshamn, Sweden - 7-9 May 2001 /
Organisation for Economic Co-operation and Development.
Nuclear Energy Agency.
Paris : OECD Publishing,
2002.
GEOTRAP is the OECD/NEA Project on Radionuclide Migration in Geologic, Heterogeneous Media carried out in the context of site evaluation and safety assessment of deep repository systems for long-lived radioactive waste. Retention of radionuclides within the geosphere for prolonged periods is an important safety function of deep geologic disposal concepts for radioactive waste. The extent to which retention processes can be relied upon in repository performance assessment depends upon the existence of well-established theoretical bases for the processes. It also depends on support for the operation of specific retention processes, and models for their quantitative evaluation, from a wide range of laboratory and field experiments and observations from nature. The fifth GEOTRAP workshop, "Geological Evidence and Theoretical Bases for Radionuclide-retention Processes in Heterogeneous Media" held in May 2001, looked at radionuclide-retention processes and their consideration and representation in performance assessments. Current approaches to characterising and modelling retention processes, and suggestions for future improvements, were presented and discussed. In addition to the material presented during the workshop, this publication includes a technical synthesis reflecting the discussions that took place as well as the conclusions and recommendations made, notably during the working group sessions.
Description based upon print version of record.
Foreword; CONTENTS; PART A: SYNTHESIS OF THE WORKSHOP; 1. Introduction; 2. Workshop achievements and general observations; 3. Observations on specific retention processes; 4. Recommendations; 5. Concluding remarks; Annex 1: STRUCTURE AND PROGRAMME OF THE WORKSHOP; Annex 2: CONCLUSIONS OF WORKING GROUP 1; Annex 3: CONCLUSIONS OF WORKING GROUP 2; Annex 4: CONCLUSIONS OF WORKING GROUP 3; Annex 5: CONCLUSIONS OF WORKING GROUP 4; Annex 6: CONCLUSIONS OF WORKING GROUP 5; PART B: WORKSHOP PROCEEDINGS; How Geologists View Retention; Molecular Scale Observations and Models of Sorption Reactions
Matrix Diffusion: Heavy-tailed Residence Time Distributions and Their Influences on Radionuclide RetentionThe Role of Colloids in Radionuclide Retention by and Transport Through Geologic Media; Immobilisation: Molecular Scale Observations of Processes Relevant to Attenuation of Radioactive Contaminants; Isotope Fractionation Effects of Radionuclide Transport in Geologic Disposal of Nuclear Waste; Evidence for Retention Processes in the Tracer Retention Understanding Experiments (TRUE); Do We See In Situ Sorption? Can Useful Information Be Derived for Migration Modelling?
Evidence for Matrix Diffusion in the TRUE-1 Block at Äspö Based on Fracture Characterisation and Modelling of Tracer TestsSolute Immobilisation: Observations from Natural Analogue Studies; The Consideration and Representation of Retention Processes in Performance Assessments Carried Out by Waste Management Organisations: What Has Been Done and Why?; The Consideration and Representation of Retention Processes in Performance Assessment: A Regulatory Perspective
The Consideration and Representation of Retention Processes in the WIPP Performance Assessment: Justification of Adopted Approaches and Interaction with the RegulatorPART C: POSTER SESSION; Effects of Heterogeneous Porosity on Retention: Results from the TRUE Laboratory Experiments; Immobilisation and Retention Processes of Uranium in Tertiary Argillaceous Sediments (Czech Republic); Colloid Retention in Äspö Crystalline Rock: A Generic Computational Assessment; Comparison of Formation Factor Logs Obtained by Electrical Methods In Situ and at Laboratory
Modelling of Colloid-facilitated Contaminant Transport with the Computer Code TRAPIC: Theoretical Basis and ApplicationMatrix Diffusion: Through-Diffusion Versus Electrical Conductivity Measurements; Discordance in Understanding of Isotope Solute Diffusion and Elements for Resolution; Determination of Natural Uranium Concentration in Boom Clay: Effect of Different Extraction Techniques; List of Participants
GEOTRAP is the OECD/NEA Project on Radionuclide Migration in Geologic, Heterogeneous Media carried out in the context of site evaluation and safety assessment of deep repository systems for long-lived radioactive waste. Retention of radionuclides within the geosphere for prolonged periods is an important safety function of deep geologic disposal concepts for radioactive waste. The extent to which retention processes can be relied upon in repository performance assessment depends upon the existence of well-established theoretical bases for the processes. It also depends on support for the operation of specific retention processes, and models for their quantitative evaluation, from a wide range of laboratory and field experiments and observations from nature. The fifth GEOTRAP workshop, "Geological Evidence and Theoretical Bases for Radionuclide-retention Processes in Heterogeneous Media" held in May 2001, looked at radionuclide-retention processes and their consideration and representation in performance assessments. Current approaches to characterising and modelling retention processes, and suggestions for future improvements, were presented and discussed. In addition to the material presented during the workshop, this publication includes a technical synthesis reflecting the discussions that took place as well as the conclusions and recommendations made, notably during the working group sessions.
Radioactive waste disposal in the ground
Radioisotopes
Radioisotopes in geology
Radioactive Waste