Nuclear reactor dip seal.

摘要

An arrangement for sealing cover gas from the clearance spaces among primary vessel head structure components in a liquid metal cooled fast breeder nuclear reactor includes a dip seal (36) having a trough (38) and blade (40) respectively suspended from adjacent head structure components (20, 22), such as rotatable plugs, the trough (38) and blade (40) extending downward to an elevation below the operating level of coolant within the vessel (14). A vent pipe (54) equalizes pressure during power operation among the separate cover gas regions formed by the dip seals (36).