Tokai Vitrification Facility (TVF) is the first plant in Japan to immobilize the High-Level Liquid Waste (HLLW) transferred from Tokai Reprocessing Plant (TRP) to the borosilicate glass.

Two problems happened through the plant operation, and the investigations to solve them are being carried on. One is the deposit that is caused by the cohesion of the dust inside the air-film cooler (a type of the exhaust pipe) of the glass melter and the other is the accumulation of noble metal elements in the HLLW on the melter bottom. The countermeasure for the former is the water injection system and for the latter is the reform of the melter bottom structure.

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