[en] The Power Reactor and Nuclear Fuel Development Corporation (PNC) constructed the TVF to vitrify high level liquid waste (HLLW) originating from the Tokai Fuel Reprocessing Plant of PNC. Ishikawajima Harima Heavy Industries Co., Ltd. delivered the facility to PNC in April, 1992, and at present, PNC carries out the cold test operation using simulated liquid waste. Most equipments in the HLLW facility are installed in shielded cells, therefore, the maintenance requires remote operation. A large integrated cell and the racks for grouping equipment in the cell were adopted. In the vitrification cell, two-arm manipulators, cranes and industrial television system are installed for remote operation and maintenance. A low flow ventilation system was adopted for ventilating the vitrification cell, and the air is processed with the off-gas treatment facility. The direct digital control system controls and monitors the process. The HLLW generated in the reprocessing of 1 ton of spent fuel is processed into one vitrified waste package of 110 kg. The TVF consists of the vitrification development building, the administration building and a stack. The processes comprise the receiving of HLLW, pretreatment, glass melting, vitrified waste handling, liquid waste treatment, off-gas treatment and vitrified waste storage. A liquid-fed ceramic melter, the off-gas and liquid waste treatment equipments, and the vitrified waste handling and storing equipment are the main components. (K.I.)