专利名称：EXPANSIBLE PLUG FOR BOTTLE HOLE OF VESSEL FOR NUCLEAR REACTOR
发明人：AREKISANDAA YOHANESU RETSUTSU
申请号：JP36786
申请日：19860107
公开号：JPS61165070Areactor pressure vessel
公开日：
19860725
专利内容由知识产权出版社提供
摘要：An expandable inflatable circular plug for sealing one of the blind bore holes which are located in a reactor vessel body flange of a nuclear reactor and which are used to fasten the reactor vessel head to the reactor vessel body by means of bolts passing through corresponding bores in a mating flange on the reactor vessel head. The plug comprises: a cylindrical member of an elastomer material disposed substantially symmetrically between first and second circular metal plates and sealingly fastened thereto so as to define a radially expandable pressure chamber within the cylindrical member; an axial bore extending from the outer surface of the first plate and opening into the annular pressure chamber; a normally closed valve disposed in the axial bore for sealing the axial bore when in its closed position and for permitting air to enter or leave the chamber via the axial bore when in its open position; and an arrangement disposed adjacent the outer surface of the first plate member for releaseably coupling the plug to a tool which is used to insert the plug into a hole to be sealed and to open the valve to supply pressurized air to the chamber to inflate and expand same. A tool and a method of inserting and removing the plug using the tool are also disclosed.
申请人：WESTINGHOUSE ELECTRIC CORP
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