SJAELVINRIKTANDE TAETNINGSSYSTEM FOER UNDERHAALLSARBETE VID TRYCKKAERL I KAERNREAKTORER

摘要

A self-aligning seal system for use in carrying out maintenance services in a nuclear fission reactor plant is disclosed. The self-aligning seal system enables an operator to block off openings in the lower portion of a water filled reactor pressure vessel for maintenance service in an underlying dry field without draining the coolant water from the reactor pressure vessel.