Patent Number: 050948016
Section: claims

1. In a nuclear reactor coolant system pressurizer having a cladding on its interior surface and wherein an original heater and heater sleeve have been removed and the bore for the heater sleeve enlarged, a replacement heater sleeve, said replacement heater sleeve comprising: a. an outer sleeve installed in the enlarged bore of the pressurizer on the same center as the original heater sleeve, said outer sleeve having its upper end seal welded to the cladding on the interior of the pressurizer and said outer sleeve being welded to the exterior surface of the pressurizer; and  b. an inner sleeve installed in the inner diameter of said outer sleeve so as to extend beyond said outer sleeve into said pressurizer and to maintain the original heater alignment in the pressurizer, said inner sleeve being welded to the lower end of said outer sleeve. 2. The heater sleeve of claim 1, wherein said inner sleeve is provided with an inner diameter sized to receive a heater of the same size as that originally installed in the pressurizer.