Evaluation on glass mold integrity of cold crucible induction melter for discharging glass melt

Vitrification technology is to incorporate radioactive nuclides in the stable glass matrix as radioactive wastes are fed on the molten glass. Accordingly, release of radioactive nuclides to the environment at the disposal site can be fundamentally prevented. Currently, in the KHNP CRI, with CCIM with 85 cm diameter, vitrification demonstration test has been conducted to confirm the possibility of treatment of liquid wastes. Among of the various operation parameter, glass mold of temperature including cooling rate is one of the vital value to form the glass structure on the vitrification process. Also, the temperature could induce diverse problems such as thermal deformation, thermal degradation and etc. of the glass mold. Therefore, in this study, the temperature recording system is installed to continuously measure the glass mold temperature during the glass melt discharge. The temperature measured is discussed in view of the integrity of glass mold. The temperature profiles were measured at eight different positions of STS mold. The glass mold shown the excellent integrity, i.e., no deformation and degradation during the glass melt discharge.