Objective
The international CHEMVAL Project, initiated in 1987, has been assessing the validity of computer-based models used to describe the geochemistry of radioactive waste disposal systems. The original project /1/2/3/ was concerned, primarily, with the verification of equilibrium models though a number of attempts were made at a priori predictive validation. CHEMVAL2 aims at building on this earlier study by targeting specific areas shown to be of particular concern in radiological assessment. The following aspects are studied:
Temperature effects, ionic strength effects, organic complexation, sorption processes Co: precipitation, coupled modelling.
The international CHEMVAL project has been assessing the validity of computer based models used to describe the chemistry of radioactive waste disposal systems. This project aims to build on earlier studies by targeting specific areas shown to be of particular concern in radiological assessment. Working groups have been established for all technical activities. These will undertake data collation and model verification tests. More demanding validation exercises will be considered only when the new models have been verified adequately but searches for suitable laboratory and field experiments have already begun. In the case of coupled chemical transport modelling, where most of the codes to be used have already been tested to some extent, the situation is more advanced. Bespoke column experiments have been commissioned allowing a methodology for predictive migration modelling to be specified.
A programme of work aimed at assessing the effects of elevated temperatures on the speciation and solubility of radioelements in groundwaters is underway and a series of verification tests have been formulated.
The objectives of work on sorption processes within CHEMVAL2 are to compare the various models which have been incorporated into geochemical speciation codes and to assess their usefulness for simulating observed behaviour in the laboratory and the field. A review of sorption models of varying complexity has been undertaken with emphasis on data availability and the applicability of each approach to predictive modelling studies.
Work programme:
1. Definition and initiation of programme, production of status reviews.
2. Execution of research programmes for each technical area encompassing data review, model development, code verification and model validation.
3. Comparison with experimental studies and reporting.
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.
- engineering and technology other engineering and technologies nuclear engineering nuclear waste management
- natural sciences earth and related environmental sciences geochemistry
- engineering and technology environmental engineering waste management
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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.
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.
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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
KT18 5BW Epsom
United Kingdom
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.