Electric Power Research Institute Incorporated

Other

J. A. Jones Applied Research Company

Robert Jeffery Lowery

Stanley Maurice Walker

Steven Allen Kenefick

J W Wood

Robert L Knipschield

Adam Roy Caban

Gregory J Frederick

Russell G Keanini

Michael L Newman

An apparatus for ultrasonically examining a weld in a nuclear steam supply system includes an elongated guide rod for positioning within a pipe of the nuclear steam supply system. An ultrasonic transducer is positioned at an end of the elongated guide rod. A collapsible shoe encloses the ultrasonic transducer. The collapsible shoe includes a biasing mechanism to allow the collapsible shoe to pass through the pipe while the pipe is at a first circumference and while the pipe is at a second circumference. The collapsible shoe continuously contacts the pipe to establish ultrasonic coupling for the ultrasonic transducer.

Apparatus and method for ultrasonically examining remotely located welds in cast stainless steel nuclear steam supply systems

An apparatus for underwater welding has a housing and a diverter. The diverter is inside the housing and has an outer sheath and an inner sheath. A gap between the housing and diverter passes a screening fluid to form an outer screening jet that prevents water from flowing into a weld site near the electrode. The inner sheath forms a pair of channels in the inner diverter. One channel passes a shielding fluid that shields the weld site. The other channel forms an exhaust line for venting the weld site during welding.

Apparatus and method for creating dry underwater welds

An apparatus for aiding in welding a pipe structure is provided. The apparatus includes first and second expandable spaced apart seals adapted to be positioned in the pipe structure and on opposed sides of a region subjected to a welding process. Each of the spaced apart seals has a circular exterior surface selectively expandable to contact and form a seal with an interior surface of the piping structure, and a circular inner surface. A light-transmitting tubular shield support extends between the first and second seals and mates with the circular inner surfaces to position the first and second seals in spaced relationship with each other. An optical device has a selectable field of view supported within the interior of the tubular support, and is rotatable about the major axis of the tubular support for producing an image of the portion of the inner surface of the piping structure that is within the field of view of the optical device. A pump supplies a liquid to the region between the exterior surface of the tubular support and the interior of the pipe structure.

Welding apparatus

A method and apparatus for use in welding pipe. The apparatus includes means for viewing the interior of the pipe, means for establishing a predetermined atmosphere in the weld zone and means for clearing liquid from the interior of the pipe.

Welding apparatus and method

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Charlotte, NC, United States of America

Robert Jeffery Lowery