Patent Number: 050911406
Section: claims

1. A method of replacing a damaged heater nozzle in a nuclear reactor coolant system pressurizer wherein an electric heater extends into the pressurizer through the heater nozzle and bore in the wall of the pressurizer, comprising: a. removing the electric heater;  b. removing the damaged heater nozzle;  c. enlarging the bore in the wall of the pressurizer;  d. installing an outer sleeve in the enlarged bore by welding it to the inner and outer surfaces of the pressurizer;  e. installing an inner sleeve inside the outer sleeve so as to extend into the pressurizer beyond the upper end of said outer sleeve and welding said inner sleeve to the lower end of said outer sleeve; and  f. installing an electric heater so as to extend through said inner sleeve into said pressurizer and welding said electric heater to the lower end of said inner sleeve. 2. The method of claim 1, wherein said outer sleeve is substantially flush with the interior of said pressurizer.