Westinghouse Electric Corporation

Robert W Beer

Robert E Meuschke

Harry N Andrews

Robert B Salton

Leonard J Balog

Louis J Malandra

Stanley R Spiegelman

Michael L Cognevich

Edmund C Eglinton

Joseph W Gulaskey

A quick-acting stud tensioner tool for enabling the loosening or tightening of a stud nut on a reactor vessel stud. The tool engages the vessel stud by closing a gripper mechanism around an upper end of the vessel stud upon a transfer of the mass of the tool from a hoist to a support structure surrounding the vessel stud. After the stud has been elongated, the gripper mechanism releases the vessel stud when the mass of the tool is transferred from the support structure surrounding the vessel stud to the hoist.

Reactor vessel stud closure system

A method of rapidly retubing a steam generator while it is vertically oriented in a containment vessel and keeping the level of radiation to which workmen are subjected at a minimal level.

Method of retubing a steam generator

Method and apparatus for removing the tube bundle from a steam generator disposed in a nuclear steam power plant while preserving an environment seal between the inside of the generator and the containment vessel. The tube bundle severed from the tubesheet is withdrawn upwardly into a multi-section crane including metal cask placed over an opened upper end of the steam generator shell. Removal of the bundle-containing cask is effectuated by the plant's radius crane and the cask lowered onto a metal cover plate made secure to the bottom of the cask. By a series of manipulations by the cask and radius cranes and use of tube and wrapper cutting equipment, length sections of the tube bundle and its wrapper can be contained in respective sequentially-separated top-and-bottom covered cask length sections for removal from the containment vessel.

Tube bundle removal method and apparatus

Growing community of inventors

Murrysville, PA, United States of America

Robert W Beer