Westinghouse Electric Corporation

Electric Power Research Institute Incorporated

Joseph M Kazan

John E Sharbaugh

William C Ritz

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

Nuclear reactor dip seal

A combination seal and bearing arrangement for use in a nuclear reactor including a vessel and vessel cover is disclosed herein. The vessel cover itself includes at least one rotatable plug which serves to perform certain position related functions within the reactor vessel and the combination seal and bearing arrangement is provided for sealing the annular opening around the rotation plug while, at the same time, providing a bearing support for the latter.

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New Stanton, PA, United States of America

Joseph M Kazan