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Title: Nuclear reactor fuel assembly duct-tube-to-inlet-nozzle attachment system

A reusable system for removably attaching the lower end 21 of a nuclear reactor fuel assembly duct tube to an upper end 11 of a nuclear reactor fuel assembly inlet nozzle. The duct tube's lower end 21 has sides terminating in locking tabs 22 which end in inwardly-extending flanges 23. The flanges 23 engage recesses 13 in the top section 12 of the inlet nozzle's upper end 11. A retaining collar 30 slides over the inlet nozzle's upper end 11 to restrain the flanges 23 in the recesses 13. A locking nut 40 has an inside threaded portion 41 which engages an outside threaded portion 15 of the inlet nozzle's upper end 11 to secure the retaining collar 30 against protrusions 24 on the duct tube's sides.
Inventors:
 [1];  [1]
  1. (Kennewick, WA)
Issue Date:
OSTI Identifier:
864328
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
Patent Number(s):
US 4348353
Contract Number:
EY-76-C-14-2170
Research Org:
Hanford Engineering Development Lab., Richland, WA (USA)
Country of Publication:
United States
Language:
English
Subject:
nuclear; reactor; fuel; assembly; duct-tube-to-inlet-nozzle; attachment; reusable; removably; attaching; 21; duct; tube; upper; 11; inlet; nozzle; terminating; locking; tabs; 22; inwardly-extending; flanges; 23; engage; recesses; 13; top; section; 12; retaining; collar; 30; slides; restrain; nut; 40; inside; threaded; portion; 41; engages; outside; 15; secure; protrusions; 24; threaded portion; inlet nozzle; nuclear reactor; reactor fuel; fuel assembly; duct tube; removably attaching; extending flange; top section; nozzle attachment; /376/976/