A new assessment of RELAP5-3D using a General Electric level swell problem

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The RELAP5-3D (version bt) computer program was used to assess a GE level swell experiment. The primary goal of the new assessment models was to faithfully represent the experimental facility and instrumentation. In developing the new models, a non-physical representation of the vessel heads in a previous assessment was found. This distortion resulted in predictions that closely matched the experimental data, but were in error. The new assessment also highlighted an instability in the calculation of interfacial drag. To explore this issue, analyses were performed using three different interfacial drag correlations appropriate for large diameter pipes and/or vessels. The results ... continued below

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17 p.

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Aumiller, D.L.; Tomlinson, E.T. & Clarke, W.G. September 1, 2000.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 21 times . More information about this article can be viewed below.

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  • Bettis Atomic Power Laboratory
    Publisher Info: Bettis Atomic Power Lab., West Mifflin, PA (United States)
    Place of Publication: West Mifflin, Pennsylvania

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Description

The RELAP5-3D (version bt) computer program was used to assess a GE level swell experiment. The primary goal of the new assessment models was to faithfully represent the experimental facility and instrumentation. In developing the new models, a non-physical representation of the vessel heads in a previous assessment was found. This distortion resulted in predictions that closely matched the experimental data, but were in error. The new assessment also highlighted an instability in the calculation of interfacial drag. To explore this issue, analyses were performed using three different interfacial drag correlations appropriate for large diameter pipes and/or vessels. The results of this study show that the Kataoka-Ishii correlation, which is currently used in RELAP5-3D, compares most favorably with the experimental data. Additionally, a numerical instability was uncovered with the analysis performed using the Gardner correlation and was traced to the calculation of bubble diameter in the bubbly flow regime.

Physical Description

17 p.

Notes

INIS; OSTI as DE00774255

Medium: P; Size: 17 pages

Source

  • 2000 RELAPS Users Seminar, Jackson Hole, WY (US), 09/12/2000--09/14/2000

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  • Report No.: B-T-3320
  • Grant Number: AC11-98PN38206
  • Office of Scientific & Technical Information Report Number: 774255
  • Archival Resource Key: ark:/67531/metadc717491

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  • September 1, 2000

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 7, 2017, 3:36 p.m.

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Aumiller, D.L.; Tomlinson, E.T. & Clarke, W.G. A new assessment of RELAP5-3D using a General Electric level swell problem, article, September 1, 2000; West Mifflin, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc717491/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.