Abstract
Thermodynamic data are an essential input for relevance of geochemical modeling and more particularly to assess the behavior of radionuclides and other pollutants in the performance assessment of a radioactive waste repository. ThermoChimie (http://www.thermochimie-tdb.com/), the thermodynamic database developed by Andra, meets the requirements of completeness, accuracy and consistency for numerous radionuclides and chemotoxic elements and various major components of a geological repository: solid phases constitutive of the host-rock, bentonites, concretes, and corresponding secondary minerals with respect to their long term evolution. ThermoChimie developments are also dedicated to evaluating specific conditions of the near field of radioactive waste, in particular regarding temperature increase and release of organic ligands or soluble salts. ThermoChimie database is extracted into compatible formats with different geochemical codes, allowing an overall consistency between different models using it in support.
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