[1F01-03] Decommissioning of Reprocessing Facility

[1F03] Study of recovery waste from High Active Solid Waste Storage (HASWS) at Tokai Reprocessing Plant

(3) Study of underwater buoyancy

*Yuito Tameta¹, Kyohei Sano¹, Satoshi Ito¹, Kazuki Akiyama¹ (1. JAEA)

Keywords:underwater buoyancy, underwater ROV, recovery equipment, radioactive waste, decommissioning, Tokai Reprocessing Plant

We are developing a system to take out waste from wet storage for the decommissioning of HASWS in Tokai Reprocessing Plant. The main component of the system is an underwater ROV, which has been used for decommissioning in the U.K. However, since the underwater ROV alone cannot handle the waste, we are considering combining it with an underwater buoyancy, which is used for lifting and transporting submarine items in the offshore field. In mock-up tests, simulated waste has been placed in a mock-up facility that simulates an actual HASWS, and tests have been conducted to lift up simulated waste using various shapes of underwater buoyancy and to move simulated waste by combining an underwater ROV and an underwater lifter. We report the results of these tests, as we obtained results regarding the removal of waste using underwater buoyancy.