Summary.

[ Thermodynamic DataBase: TDB ] The solubility of radionuclides can be evaluated and estimated by using the geochemical equilibrium models in the safety assessment of the geological disposal. For these evaluations and estimations, JAEA (and its predecessor JNC) has developed thermodynamic databases (TDB) for collecting thermodynamic constants. This Website contains our TDBs and some TDBs developed by other organizations, e.g. OECD/NEA, which are formatted to some geochemical computer programs.     Summary of TDB (table) top [ Sorption DataBase: SDB ] Sorption of radionuclides in buffer materials and rocks is one of the key processes in the safety assessment of the geological disposal. JAEA has developed sorption database (JAEA-SDB) which includes extensive compilation of sorption Kd data by batch experiments, extracted from published literatures.     Summary of SDB top [ Diffusion DataBase: DDB ] Diffusion of radionuclides in buffer materials and rocks is one of the key processes in the safety assessment of the geological disposal. JAEA has developed diffusion database (JAEA-DDB) which includes extensive compilation of diffusion data (effective diffusivity - De, apparent diffusivity - Da) by diffusion experiments, extracted from published literatures.     Summary of DDB top These databases have been firstly developed as an important basis for the H12 performance assessment (PA) of high-level radioactive waste disposal in Japan, and have been improved and updated in view of potential future data needs. The purpose of this website is to provide public access to the following databases which have been developed by JAEA. These databases are available.

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