JAEA thermodynamic database of performance assessment of geological disposal of high-level and TRU wastes; Selection of thermodynamic data of selenium

Doi, Reisuke  ; Kitamura, Akira  ; Yui, Mikazu

Within the scope of the JAEA thermodynamic database project for performance assessment of geological disposal of high-level and TRU radioactive wastes, the selection of the thermodynamic data on the inorganic compounds and complexes of selenium have been carried out. Selection of thermodynamic data of selenium has been based on a thermodynamic database of selenium published by the Nuclear Energy Agency in the Organisation for Economic Co-operation and Development (OECD/NEA). The remarks of a thermodynamic database by OECD/NEA found by the authors were noted in this report and then thermodynamic data have been reviewed after surveying latest literatures. Some thermodynamic values of iron selenides not selected by OECD/NEA due to low reliability, which are important for the performance assessment of geological disposal of radioactive wastes, were selected as a tentative value with specifying reliability and needs of the value to be determined.