We have been researching production methods for a high-level waste (HLW) granule, and methods for the safe storage of this granule until minor actinide partitioning and transmutation (MA P&T) technology can be developed and applied to the stored HLW. We selected a rotary kiln system to produce the HLW granule from high-level liquid waste (HLLW). HLLW injected into the rotary kiln went through drying, calcination, and granulation processes, until it became HLW granules. Each of the processes was investigated via a batch type rotary kiln device using simulated HLLW. In this research, we identified optimal temperature conditions, and found that a peeling and grinding mechanism was necessary between the drying and calcination processes, and that at least three independent heaters were necessary for the rotary kiln system.
展开▼
