Study on Anti-overturning self-locking device of CRDM for Offshore Nuclear Power Platform

The offshore floating nuclear power plant is an organic combination of offshore ship platform engineering and nuclear power engineering. Its operation is affected and restricted by marine environmental conditions. Under extreme sea conditions, serious nuclear safety accidents can be caused by the capsizing of ship platforms. The passive anti-overturning self-locking device proposed in this paper can lock the drive rod connected to the control rod when the platform overturns, preventing the control rod from exiting the core and ensure the safety of the reactor core. The test results show that the control rod self-locking of the control rod driving mechanism can be realized after the tilt of the ship platform exceeds 90 degrees. It is an important means to ensure nuclear safety and efficiency for offshore floating nuclear power plant under the overturning condition of the ship platform.