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Title: Nuclear reactor shutdown system

Abstract

An inherent shutdown system for a nuclear reactor having neutron absorbing rods affixed to an armature which is held in an upper position by a magnetic flux flowing through a Curie temperature material. The Curie temperature material is fixedly positioned about the exterior of an inner duct in an annular region through which reactor coolant flows. Elongated fuel rods extending from within the core upwardly toward the Curie temperature material are preferably disposed within the annular region. Upon abnormal conditions which result in high neutron flux and coolant temperature, the Curie material loses its magnetic permeability, breaking the magnetic flux path and allowing the armature and absorber rods to drop into the core, thus shutting down the fissioning reaction. The armature and absorber rods are retrieved by lowering the housing for the electromagnet forming coils which create a magnetic flux path which includes the inner duct wall. The coil housing then is raised, resetting the armature.

Inventors:
 [1];  [2];  [3];  [4]
  1. (Niskayuna, NY)
  2. (Monroeville, PA)
  3. (Murrysville, PA)
  4. (Penn Hills, PA)
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
OSTI Identifier:
864066
Patent Number(s):
4304632
Assignee:
Westinghouse Electric Corp. (Pittsburgh, PA) SNL
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nuclear; reactor; shutdown; inherent; neutron; absorbing; rods; affixed; armature; held; upper; position; magnetic; flux; flowing; curie; temperature; material; fixedly; positioned; exterior; inner; duct; annular; region; coolant; flows; elongated; fuel; extending; core; upwardly; preferably; disposed; abnormal; conditions; result; loses; permeability; breaking; path; allowing; absorber; drop; shutting; fissioning; reaction; retrieved; lowering; housing; electromagnet; forming; coils; create; wall; coil; raised; resetting; rods extending; temperature material; coolant temperature; magnetic permeability; coolant flows; absorber rods; curie temperature; fuel rods; reactor coolant; magnetic flux; nuclear reactor; neutron flux; coolant flow; fuel rod; reactor shutdown; annular region; neutron absorbing; preferably disposed; abnormal condition; normal conditions; flux path; elongated fuel; inner duct; inherent shutdown; normal condition; flux flow; fixedly positioned; /376/976/

Citation Formats

Bhate, Suresh K., Cooper, Martin H., Riffe, Delmar R., and Kinney, Calvin L. Nuclear reactor shutdown system. United States: N. p., 1981. Web.
Bhate, Suresh K., Cooper, Martin H., Riffe, Delmar R., & Kinney, Calvin L. Nuclear reactor shutdown system. United States.
Bhate, Suresh K., Cooper, Martin H., Riffe, Delmar R., and Kinney, Calvin L. Thu . "Nuclear reactor shutdown system". United States. https://www.osti.gov/servlets/purl/864066.
@article{osti_864066,
title = {Nuclear reactor shutdown system},
author = {Bhate, Suresh K. and Cooper, Martin H. and Riffe, Delmar R. and Kinney, Calvin L.},
abstractNote = {An inherent shutdown system for a nuclear reactor having neutron absorbing rods affixed to an armature which is held in an upper position by a magnetic flux flowing through a Curie temperature material. The Curie temperature material is fixedly positioned about the exterior of an inner duct in an annular region through which reactor coolant flows. Elongated fuel rods extending from within the core upwardly toward the Curie temperature material are preferably disposed within the annular region. Upon abnormal conditions which result in high neutron flux and coolant temperature, the Curie material loses its magnetic permeability, breaking the magnetic flux path and allowing the armature and absorber rods to drop into the core, thus shutting down the fissioning reaction. The armature and absorber rods are retrieved by lowering the housing for the electromagnet forming coils which create a magnetic flux path which includes the inner duct wall. The coil housing then is raised, resetting the armature.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

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