It is emerging as a futuristic technology for vitrification of high level liquid waste. Besides being compact and advantageous as in-cell equipment, it offers flexibility, susceptibility to treat various waste forms with better waste loading and enhanced melter life. The cold crucible is manufactured from contiguous segments forming a cylindrical volume, but separated by a thin layer of electrically insulating material. The number and the shape of the segments and the insulating gap between them must be optimized to minimize the power dissipation by induced currents in the crucible, while ensuring cooling of the crucible.
The vitrified product is encapsulated in suitable containers and over packs and stored for dissipation of radioactive decay, heat and surveillance for a period of 15-20 years. Sufficient data can be generated on the product behavior and the radiation and thermal conditions of the product are expected to get stabilized to a level where transport of the product becomes viable. On the basis if safety and techno-economic considerations, a natural draught air cooling system has been designed for the storage vault.