The objectives of this review study was to come to a critical evaluation of the state-of-the-art in the different research areas of the EC coordinated project MIRAGE (MIgration of RAdionuclides through the GEosphere) which was launched by the Commission in 1983. The study focused on the research work covered under the umbrella MIRAGE such as geochemical behaviour of radionuclides in natural aquifer systems including colloids and organic materials, natural migration systems including Natural Analogue Studies, modelling of radionuclide migration including model verification and validation and finally migration and retardation experiments performed by laboratory and in-situ tests.
The review study was carried out by a team of experts from six organisations with two main goals in mind:
- to evaluate how the results obtained from the MIRAGE project contribute to performance/safety assessment of deep geological disposal of radioactive waste
- and to provide the Commission with advice on the most important issues where further work is required in the Commission 4th R&D programme on Nuclear Fission Safety (1994-1998) and where our understanding is sufficient.
The topics which needed to be performed within the study were:
- Chemistry of actinides and fission products in natural aquifer systems
- Water-rock interaction, radionuclide transport modelling and data collection
- Natural analogue studies
- Geochemical modelling in the frame of the CHEMVAL project
- Contribution of the MIRAGE project to safety assessment of geological disposal.
Whereby the work has been guided by the following questions:
- Scope of the available data
- What information is still needed, in which format (qualitative/quantitative), for use in?
- How could the data, information be obtained?
- What information is not needed?
- Where are the major uncertainties?
- Are there site-specific aspects?
Funding SchemeCSC - Cost-sharing contracts