Resources Contact Us Home
Reconstitutable nuclear fuel assembly having locking tubes with dimples

Image Number 2 for United States Patent #4738821.

In a reconstitutable nuclear fuel assembly, a top-nozzle-to-control-rod-guide-thimble attachment system employing a reusable locking tube having dimples. The guide thimble has longitudinal slots defining fingers therebetween. The fingers have rim (bulge) portions which engage a groove in the control rod passageway of the top nozzle adaptor plate for top-nozzle-to-guide-thimble attachment. The finger rim portions are prevented from moving radially inward, and thus leaving the groove, by a locking tube placed in the guide thimble. The locking tube has dimples at two elevations. The dimples interact with the other components of the attachment system to assure proper seating of the locking tube during locking tube installation and to assure against unintentional longitudinal movement of the locking tube during fuel assembly handling. An improperly seated locking tube complicates the underwater fuel assembly reconstitution operation.

  Recently Added Patents
Gas flow indicator
Separate matching models based on type of phone associated with a caller
Replacing memory pointers with implicit pointers to be used in compiler-generated debug output
Method of synchronization for low power idle
Prevention and reduction of blood loss
Device and method for generating soft tissue contrast images
Tablet computer
  Randomly Featured Patents
Nonvolatile SRAM/latch circuit using current-induced magnetization reversal MTJ
Propulsion arrangement for a marine vessel
Multi-domain liquid crystal display device with particular dielectric structures
Apparatus for holding a medical instrument in place
Sunscreen emulsion composition and method of use
Process for producing metallic chromium
Method for the manufacture of corrosion resistant and decorative coatings and laminated systems for metal substrates
Method and apparatus for producing duplex copies
Method and system for polar modulation using a direct digital frequency synthesizer
Liquid crystal composition and liquid crystal display element