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Title: Axially staggered seed-blanket reactor fuel module construction

A heterogeneous nuclear reactor of the seed-blanket type is provided wher the fissile (seed) and fertile (blanket) nuclear fuels are segregated axially within each fuel element such that fissile and fertile regions occur in an alternating pattern along the length of the fuel element. Further, different axial stacking patterns are used for the fuel elements of at least two module types such that when modules of different types are positioned adjacent to one another, the fertile regions of the modules are offset or staggered. Thus, when a module of one type is surrounded by modules of the second type the fertile regions thereof will be surrounded on all sides by fissile material. This provides enhanced neutron communication both radially and axially, thereby resulting in greater power oscillation stability than other axial arrangements. The arrangements of the fissile and fertile regions in an alternating axial manner minimizes the radial power peaking factors and provides a more optional thermal-hydraulic design than is afforded by radial arrangements.
Authors:
 [1] ;  [2]
  1. (Monroeville, PA)
  2. (West Mifflin, PA)
Publication Date:
OSTI Identifier:
865385
Report Number(s):
US 4507259
DOE Contract Number:
AC11-76PN00014
Resource Type:
Patent
Research Org:
WESTINGHOUSE ELECTRIC CORP
Country of Publication:
United States
Language:
English
Subject:
axially; staggered; seed-blanket; reactor; fuel; module; construction; heterogeneous; nuclear; reactor; seed-blanket; type; provided; fissile; seed; fertile; blanket; nuclear; fuels; segregated; axially; fuel; element; fissile; fertile; regions; occur; alternating; pattern; length; fuel; element; axial; stacking; patterns; fuel; elements; module; types; modules; types; positioned; adjacent; fertile; regions; modules; offset; staggered; module; type; surrounded; modules; type; fertile; regions; surrounded; fissile; material; provides; enhanced; neutron; communication; radially; axially; resulting; power; oscillation; stability; axial; arrangements; arrangements; fissile; fertile; regions; alternating; axial; manner; minimizes; radial; power; peaking; factors; provides; optional; thermal-hydraulic; design; afforded; radial; arrangements; nuclear fuels; fuel elements; fuel element; fuel element; fuel element; nuclear fuel; nuclear reactor; reactor fuel; fissile material; positioned adjacent; provides enhanced; module construction; fuel module; enhanced neutron /376/976/