Final Report on the Physico-chemical characterization of reconditioned waste form and stability testing: PREDIS Deliverable 6.6

This report describes the experiments and characterizations, which have been conducted to evaluate the disposability of candidate waste forms for radioactive solid organic waste (RSOW). The investigated candidate waste forms were geopolymers/ alkali activated materials, cements (CEM I, CEM II, CEM III), glass and ceramic materials. Partners contributing to this research were SIIEG NASU, UAM, CSIC, CIEMAT, POLIMI, UH, VTT, SCK CEN, USFD and CEA. WP6 “Innovations in solid organic waste treatment and conditioning” of the PREDIS project focused on the investigation and development of innovative technologies for volume reduction of RSOW by different methods and immobilization of reconditioned waste into solid matrices. In task T6.6 “Physicochemical characterization of reconditioned waste forms and stability testing” the research consisted of; short- and long-term leaching experiments, chemical characterization of leachants and analyses of possible changes in solid samples in leaching or immersion experiments. One of the main aims was to produce comparable results in the end of the project. Thus, common leaching protocol was created for the experiments and calculation of the results was also unified to achieve harmonized results.