CFD analysis of a liquid mercury target for the National Spallation Neutron Source

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Description

Computational fluid dynamics (CFD) is being used to analyze the design of the National Spallation Neutron Source (NSNS) target. The target is subjected to the neutronic (internal) heat generation that results from the proton collisions with the mercury nuclei. The liquid mercury simultaneously serves as the neutronic target medium, transports away the heat generated within itself, and cools the metallic target structure. Recirculation and stagnation zones within the target are of particular concern because of the likelihood that they will result in local hot spots. These zones exist because the most feasible target designs include a complete U-turn flow redirection. ... continued below

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15 p.

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Wendel, M.W. & Tov, M.S. February 1, 1997.

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Description

Computational fluid dynamics (CFD) is being used to analyze the design of the National Spallation Neutron Source (NSNS) target. The target is subjected to the neutronic (internal) heat generation that results from the proton collisions with the mercury nuclei. The liquid mercury simultaneously serves as the neutronic target medium, transports away the heat generated within itself, and cools the metallic target structure. Recirculation and stagnation zones within the target are of particular concern because of the likelihood that they will result in local hot spots. These zones exist because the most feasible target designs include a complete U-turn flow redirection. Although the primary concern is that the target is adequately cooled, the pressure drop from inlet to outlet must also be considered because pressure drop directly affects structural loading and required pumping power. Various design options have been considered in an effort to satisfy these design criteria. Significant improvements to the design have been recommended based on the results. Detailed results are presented for the current target design including a comparison with published pressure-drop data. Comparisons are also made with forced convection heat transfer data for liquid mercury flow in circular tubes.

Physical Description

15 p.

Notes

INIS; OSTI as DE96015237

Source

  • 1997 ASME Fluids Engineering Division summer meeting, Vancouver (Canada), 22-26 Jul 1997

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  • Other: DE96015237
  • Report No.: CONF-970739--1
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/486155 | External Link
  • Office of Scientific & Technical Information Report Number: 486155
  • Archival Resource Key: ark:/67531/metadc675243

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Creation Date

  • February 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

Description Last Updated

  • Jan. 15, 2016, 3:59 p.m.

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Wendel, M.W. & Tov, M.S. CFD analysis of a liquid mercury target for the National Spallation Neutron Source, report, February 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc675243/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.