OVERHEAD SHIELDING COVER OF LIQUID-METAL COOLED REACTOR Russian patent published in 2002 - IPC

FIELD: automatic refueling of nuclear reactors. SUBSTANCE: reactor overhead cover has stationary part accommodating large rotary plug installed therein in a spaced relation and small rotary plug mounted in the latter in a spaced relation. Liquid seals and supporting assemblies are provided in clearances. Cover incorporates sealing mechanisms and pairs of linear drives engageable with them. Sealing mechanisms are mounted in clearances above supporting assemblies and have flexible seals pressurizing these clearances. During refueling reactor is held in depressurized state only while rotary plugs are rotating. EFFECT: improved conditions for attending personnel. 5 cl, 9 dwg