Study of recovery waste from High Active Solid Waste Storage (HASWS) at Tokai Reprocessing Plant, 5; Combination test of underwater ROV and underwater lifter (grab type)

Akuzawa, Tadashi; Tameta, Yuito ; Sano, Kyohei; Akiyama, Kazuki 

In preparation for the decommissioning of the HASWS, we are considering using an underwater ROV and a submersible lifter (grab type) to remove hull cans, stainless steel filters and stirrers. In this case, to confirm the feasibility of this method, we placed simulated filters and contaminated equipment in various positions in a mock-up facility simulating a wet cell and conducted a test to move them using an underwater ROV and a submersible lifter (grab type). As a result of the test, we confirmed that in all positions, the filters and contaminated equipment could be grasped and floated by the underwater lifter (grab type) and then moved by the underwater ROV.