Journal of Nuclear Fuel Cycle and Waste Technology

This paper investigated the characteristics of wasteform containing a spent zeolite used as a separating agent of FPs for recycling LiCl waste which would be generated from pyrochemical process of spent PWR fuel. In this study, a conventional borosilicate and Ca-rich glass were used as a consolidating agent for spent zeolite and it';s mixing ratio was changed in the range, 25~35wt%. The leach rates of Cs and Sr had about 0.1~0.01g/m2day and 0.001~0.0001g/m2day, respectively. The leach resistance of Cs increased with amount of SAP and it showed about 10 times higher in the Ca-rich glass wasteform than in the conventional borosilciate glass wasteform. The compressive strength of wasteform was affected with the amount of glass. Thermal expansion rate of containing 30wt% glass has relatively lower than others. Also, the melting temperature was little changed in given mixing ratio of glass.

Keywords

spent salt,zeolite,silicate-aluminophosphate(SAP),wasteform,leach rate,compressive strenth