Westinghouse Electric Corporation

The United States of America As Represented by the United States

George Bieberbach

Robert M Wilson

Franklin D Obermeyer

Robert L Sylvester

King W Chan

Jawahar K Visaria

Willis B Middlebrooks

Randall C Johnson

Richard R Cruz

Alfred Lohmeier

James M Duke

Donald J Bongaards

Gregory V Smith

This patent discloses a secondary fluid supply system for a steam generator used in nuclear reactor power plants. The secondary fluid supply system comprises a secondary fluid (feedwater) inlet nozzle near the base of the steam generator shell, a feedwater riser pipe spaced between the shell of the steam generator and the tube bundle wrapper, the upper end of the feedwater riser pipe being connected to a distribution ring having a plurality of spray nozzles positioned in the recirculating pool above the top of the U-shaped heat exchanger tubes.

Steam generator

A closing device for removably securing and sealing engaging a closure around an opening in a transportation cask for radioactive materials is disclosed herein. The closing device comprises a plurality of shear key assemblies uniformly spaced around the outer portion of the closure, each of which includes a shear key having an elongated bolt portion movably mounted in the closure, as well as a latch portion connected to one end of the bolt portion that is insertable into and retractable out of a slot located in the edge of the cask that defines the cask opening. The latch portion is beveled so as to wedgingly engage the slot when inserted therein in order to apply a sealing pressure around the outer edge of the closure. The width of the latch portion of the key is substantially larger than the bolt portion, thereby giving the shear key a T-shaped profile. The broad width of the bolt portion allows the shear key to more uniformly distribute a sealing pressure around the closure. The closing device also includes either a single or multiple drive mechanisms for forcing the latch portions of the shear keys into and out of the slots in the cask. The single drive mechanism is extremely rapid in operation and advantageously applies the same amount of closing force to each shear key simultaneously, while the use of multiple drive mechanisms affords more uniform sealing pressure around the closure edge and more effective radiation shielding properties to the closure.

Latching device for securing a closure to a cask for transporting

A plurality of double walled tubes are so disposed between a pair of spaced apart tube sheets so that the outer wall terminates adjacent one tube sheet and the inner wall terminates adjacent the other tube sheet and a shell portion enclosing the space between the tube sheets is removably attached to the tube sheets.

Heat exchanger with double walled tubes

A straight shell and tube heat exchanger utilizing double wall tubes and three tubesheets to ensure separation of the primary and secondary fluid and reliable leak detection of a leak in either the primary or the secondary fluids to further ensure that there is no mixing of the two fluids.

Heat exchanger with leak detecting double wall tubes

Growing community of inventors

Tampa, FL, United States of America

George Bieberbach