A Nitrogen Supply System for Post-Run Cooldown of Nuclear Reactors

  • J. H. Fretwell
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 10)


During a reactor test the nozzle, neutron reflector, and fuel elements are cooled by flowing hydrogen. The coolant is preheated by being passed countercurrently through the nozzle wall and reflector before entering the reactor core [1]. This flow can be as high as 70 lb m /sec (i.e., 7000 gal/min) in the test facilities being used. The liquid hydrogen reaches the reactor through 8-in.-diameter vacuum-jacketed lines.


Heat Exchanger Fuel Element Liquid Hydrogen Atmospheric Vaporizer Tank Farm 


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  1. 1.
    F. J. Edeskuty, in Technology and Uses of Liquid Hydrogen, Scott, Denton, and Nicholls, ed., Pergamon Press, New York (1964), Chap. 6.Google Scholar
  2. 2.
    G. K. Platt and C. L. Wood, in Advances in Cryogenic Engineering, Vol. 7, Plenum Press, New York (1961), p. 296.Google Scholar
  3. 3.
    R. Crowl, Cosmodyne Corp. Report CE-372-R, Rev. 1 (1963).Google Scholar

Copyright information

© Plenum Press, New York 1965

Authors and Affiliations

  • J. H. Fretwell
    • 1
  1. 1.Los Alamos Scientific LaboratoryUniversity of CaliforniaLos AlamosUSA

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