Internal-bore-welding of 2 1/4 Cr--1 Mo steel tube-to-tubesheet joints

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:7363750

Moorhead, A J; Slaughter, G M

In order to avoid the disadvantages of the conventional face-side tube-to-tubesheet weld, the steam generators for the Clinch River Breeder Reactor Plant (a power-producing demonstration LMFBR) will be built using a relatively new technique known as internal-bore-welding (IBW). In IBW the tube does not pass through the tubesheet but rather is welded to a short stub machined on the tube side of the tubesheet. This joint has the important advantages of being inspectable by radiography and eliminating the crevice; however, it is much more difficult to weld than is the face-side design. Because of the close proximity of the tubes, there is not room for an orbiting-arc welding head on the outside of the tube. Consequently, this weld must be made by welding from the inside- or bore-side of the tube. The results are presented of the initial phases of a program undertaken at ORNL to develop improved bore-side welding equipment, to gain further understanding of this technique, and to develop mechanical property data for autogeneous welds in 2 1/4 Cr-1 Mo steel tube and tubesheet materials.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• OSTI ID: 7363750
• Report Number(s): CONF-760514-1
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210500* -- Power Reactors
Breeding
BOILERS
BREEDER REACTORS
CLINCH RIVER BREEDER REACTOR
EPITHERMAL REACTORS
FABRICATION
FAST REACTORS
FBR TYPE REACTORS
JOINING
JOINTS
LIQUID METAL COOLED REACTORS
POWER REACTORS
REACTORS
SODIUM COOLED REACTORS
STEAM GENERATORS
TUBES
VAPOR GENERATORS
WELDED JOINTS
WELDING