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Title: Nuclear reactivity control using laser induced polarization

Abstract

A control element for reactivity control of a fission source provides an atomic density of .sup.3 He in a control volume which is effective to control criticality as the .sup.3 He is spin-polarized. Spin-polarization of the .sup.3 He affects the cross section of the control volume for fission neturons and hence, the reactivity. An irradiation source is directed within the .sup.3 He for spin-polarizing the .sup.3 He. An alkali-metal vapor may be included with the .sup.3 He where a laser spin-polarizes the alkali-metal atoms which in turn, spin-couple with .sup.3 He to spin-polarize the .sup.3 He atoms.

Inventors:
 [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
867635
Patent Number(s):
4976911
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nuclear; reactivity; control; laser; induced; polarization; element; fission; source; provides; atomic; density; volume; effective; criticality; spin-polarized; spin-polarization; affects; section; neturons; hence; irradiation; directed; spin-polarizing; alkali-metal; vapor; included; spin-polarizes; atoms; spin-couple; spin-polarize; source provides; metal atom; control volume; control element; metal vapor; radiation source; metal atoms; laser induced; reactivity control; induced polarization; irradiation source; nuclear reactivity; fission source; atomic density; control criticality; /376/

Citation Formats

Bowman, Charles D. Nuclear reactivity control using laser induced polarization. United States: N. p., 1990. Web.
Bowman, Charles D. Nuclear reactivity control using laser induced polarization. United States.
Bowman, Charles D. Mon . "Nuclear reactivity control using laser induced polarization". United States. https://www.osti.gov/servlets/purl/867635.
@article{osti_867635,
title = {Nuclear reactivity control using laser induced polarization},
author = {Bowman, Charles D},
abstractNote = {A control element for reactivity control of a fission source provides an atomic density of .sup.3 He in a control volume which is effective to control criticality as the .sup.3 He is spin-polarized. Spin-polarization of the .sup.3 He affects the cross section of the control volume for fission neturons and hence, the reactivity. An irradiation source is directed within the .sup.3 He for spin-polarizing the .sup.3 He. An alkali-metal vapor may be included with the .sup.3 He where a laser spin-polarizes the alkali-metal atoms which in turn, spin-couple with .sup.3 He to spin-polarize the .sup.3 He atoms.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

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