Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Systems and methods for identifying malicious domains using internet-wide DNS lookup patterns
High-efficiency preambles for communications systems over pseudo-stationary communication channels
Elegant solutions for fingerprint image enhancement
(4939
System and method for redundant array copy removal in a pointer-free language
Blueberry plant named `DrisBlueFour`
Brushless motor drive apparatus and drive method
  Randomly Featured Patents
Respiratory therapy control based on cardiac cycle
Nozzle particularly suited to direct metal deposition
Use of transition metal complexes as bleach catalysts
Cap closure and detachable liner
Lacrosse stick head frame
Orally bioavailable compounds and methods for inhibiting platelet aggregation
Article contour follower mechanism
Multi-test format with gel-forming matrix for characterization of microorganisms
2'-nitrobenzyl-modified ribonucleotides
Paper sizing agent and process for the preparation thereof