Stability analysis on single-phase natural circulation in Argonne lead loop facility |
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Authors: | Qiao Wu James J. Sienicki |
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Affiliation: | a Department of Nuclear Engineering, Oregon State University, 130 Radiation Center, Corvallis, OR 97331, USA;b Reactor Analysis and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA |
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Abstract: | One-dimensional linear stability analysis was performed for single-phase lead–bismuth eutectic (LBE) 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. |
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