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Title: Nuclear core positioning system

A structural support system for the core of a nuclear reactor which achieves relatively restricted clearances at operating conditions and yet allows sufficient clearance between fuel assemblies at refueling temperatures. Axially displaced spacer pads having variable between pad spacing and a temperature compensated radial restraint system are utilized to maintain clearances between the fuel elements. The core support plates are constructed of metals specially chosen such that differential thermal expansion produces positive restraint at operating temperatures.
Authors:
 [1] ;  [2] ;  [3]
  1. (Irwin, PA)
  2. (Greensburg, PA)
  3. (Murrysville, PA)
Publication Date:
OSTI Identifier:
863271
Report Number(s):
US 4135974
DOE Contract Number:
AT(11-1)-3046
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nuclear; core; positioning; structural; support; core; nuclear; reactor; achieves; relatively; restricted; clearances; operating; conditions; allows; sufficient; clearance; fuel; assemblies; refueling; temperatures; axially; displaced; spacer; pads; variable; pad; spacing; temperature; compensated; radial; restraint; utilized; maintain; clearances; fuel; elements; core; support; plates; constructed; metals; specially; chosen; differential; thermal; expansion; produces; positive; restraint; operating; temperatures; differential thermal; structural support; nuclear core; operating conditions; fuel assemblies; fuel elements; fuel element; thermal expansion; nuclear reactor; operating temperature; operating temperatures; support plate; operating condition; core support; axially displaced; temperature compensated; refueling temperature /376/976/