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Title: Nuclear reactor spacer grid and ductless core component

The invention relates to a nuclear reactor spacer grid member for use in a liquid cooled nuclear reactor and to a ductless core component employing a plurality of these spacer grid members. The spacer grid member is of the egg-shell type and is constructed so that the walls of the cell members of the grid member are formed of a single thickness of metal to avoid tolerance problems. Within each cell member is a hydraulic spring which laterally constrains the nuclear material bearing rod which passes through each cell member against a hardstop in response to coolant flow through the cell member. This hydraulic spring is also suitable for use in a water cooled nuclear reactor. A core component constructed of, among other components, a plurality of these spacer grid members, avoids the use of a full length duct by providing spacer sleeves about the sodium tubes passing through the spacer grid members at locations between the grid members, thereby maintaining a predetermined space between adjacent grid members.
Authors:
 [1] ;  [2]
  1. (Kennewick, WA)
  2. (Richland, WA)
Publication Date:
OSTI Identifier:
866905
Report Number(s):
US 4818479
DOE Contract Number:
AC06-76FF02170
Resource Type:
Patent
Research Org:
WESTINGHOUSE HANFORD CO
Country of Publication:
United States
Language:
English
Subject:
nuclear; reactor; spacer; grid; ductless; core; component; relates; nuclear; reactor; spacer; grid; liquid; cooled; nuclear; reactor; ductless; core; component; employing; plurality; spacer; grid; spacer; grid; egg-shell; type; constructed; walls; cell; grid; formed; single; thickness; metal; avoid; tolerance; cell; hydraulic; spring; laterally; constrains; nuclear; material; bearing; rod; passes; cell; hardstop; response; coolant; flow; cell; hydraulic; spring; suitable; water; cooled; nuclear; reactor; core; component; constructed; components; plurality; spacer; grid; avoids; length; duct; providing; spacer; sleeves; sodium; tubes; passing; spacer; grid; locations; grid; maintaining; predetermined; space; adjacent; grid; core component; core component; core component; nuclear reactor; nuclear reactor; nuclear reactor; nuclear reactor; coolant flow; cooled nuclear; cooled nuclear; spacer grid; spacer grid; spacer grid; spacer grid; spacer grid; spacer grid; nuclear material; water cooled; liquid cooled; tubes passing; reactor space; reactor space; reactor spacer; reactor spacer; material bearing; tubes pass; ductless core; ductless core /376/976/