Establishment of Data Base Files of Thermodynamic Data Developed by OECD/NEA Part II; Thermodynamic Data of U, Am, Tc, Np and Pu with Auxiliary Species

Yoshida, Yasushi*; Shibata, Masahiro 

Thermodynamic data base for compounds and complexes of actinides and fission products with auxiliary species specialized in modeling requirements for safety assessments of radioactive waste disposal systems are being developed by NEA TDB project of OECD/NEA. In this project, relevant data bases for compounds and complexes of U, Am, Tc, Np and Pu with auxiliary species were updated and published in 2003. JNC established the data base files available for geochemical calculation codes using these updated data. The procedure for establishment and contents of data base files are described in this report. These data base files were prepared as the formats of major geochemical codes PHREEQE, PHREEQC, EQ3/6 and Geochemist's workbench.Additionally modification for data in the thermodynamica data base files which had been already published by JNC was also done. This procedure and revised data bases are shown in the appendix of this report.