Corrosion resistant steam generator and method of making same

Patent · Tue Feb 03 04:00:00 EST 1987

OSTI ID:6815859

Stol, I; Appleman, R H

A method is described of fabricating a steam generator comprising the steps of: providing inlet and outlet chambers and a secondary coolant chamber and at least one primary coolant tube passing through the secondary coolant chamber and connecting the inlet chamber to the outlet chamber; positioning a tubesheet between one of the inlet or outlet chambers and the secondary chamber, the tubesheet having at least one passage therethrough; upsetting ends of the primary coolant tube to form a transition region in the ends, the transition region having smoothly varying wall thickness; reducing the outside diameter of a portion of the upset ends to accept a sleeve; installing the sleeve on the outside diameter portion; closing any space between the sleeve and the reduced outside diameter portion along an interface therebetween; welding the sleeve to the primary coolant tube to form a sleeve and tube assembly; inserting the sleeve and tube assembly into the passage in the tubesheet; and welding the sleeve and tube assembly to the tubesheet.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4639992
• OSTI ID: 6815859
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
BOILERS
COOLANTS
COOLING SYSTEMS
CORROSION RESISTANCE
DIMENSIONS
ENERGY SYSTEMS
FABRICATION
INSTALLATION
JOINING
POSITIONING
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
STEAM GENERATORS
THICKNESS
TUBES
VAPOR GENERATORS
WELDING