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Stability Analysis on Single-Phase Natural Circulation in Argonne Lead Loop Facility

[+] Author Affiliations
Qiao Wu

Oregon State University, Corvallis, OR

James J. Sienicki

Argonne National Laboratory, Argonne, IL

Paper No. ICONE10-22375, pp. 763-769; 7 pages
doi:10.1115/ICONE10-22375
From:
  • 10th International Conference on Nuclear Engineering
  • 10th International Conference on Nuclear Engineering, Volume 2
  • Arlington, Virginia, USA, April 14–18, 2002
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-3596-0 | eISBN: 0-7918-3589-8
  • Copyright © 2002 by ASME

abstract

One-dimensional linear stability analysis was performed for single-phase lead-bismuth eutectic natural circulation. The Nyquist criterion and a root search method were employed to find the linear stability boundary of both forward and backward circulations. It was found that the natural circulations could be linearly unstable in a high Reynolds number region. Increasing loop friction makes a forward circulation more stable, but destabilizes the corresponding backward circulation under the same heating/cooling conditions. The characteristic wavelength of an unstable disturbance is roughly equal to the entire loop length.

Copyright © 2002 by ASME
Topics: Stability

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