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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Analytic solutions to linear, time-dependent fission product deposition models for isothermal laminar, slug, or multiregion flow conditions
  name:
    name part: Durkee, Joe Worthington
    role:
      role term: creator
  name:
    name part: Chui, Charles K. T.
    role:
      role term: degree committee member.
  name:
    name part: Henriksen, Mogens
    role:
      role term: degree committee member.
  name:
    name part: Lee, Clarence E.
    role:
      role term: degree supervisor.
  name:
    name part: Parish, Theodore A.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1983
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiv, 170 leaves : illustrations ; 29 cm
  abstract: The time-dependent convective-diffusion equation with radioactive decay is solved analytically in axisymmetric cylindrical geometry for laminar and slug velocity profiles under isothermal conditions. Concentration dependent diffusion is neglected. The laminar flow solution is derived using the method of separation of variables and Frobenius' technique for constructing a series expansion about a regular singular point. The slug flow multiregion solution is obtained using the method of separation of variables. The Davidon Variable Metric Minimization algorithm is used to compute the coupling coefficients. These solutions, which describe the transport of fission products in a flowing stream, are then used to determine the concentration of radioactive material deposited on a conduit wall using a standard mass transfer model. Extensive single and multiregion parametric investigations are conducted by varying the wall mass transfer coefficient, diffusion coefficient, flow velocity, pipe radius, and species half-life. Single region results indicate that the plateout estimates for the slug flow model are typically 5 to 100% greater than for the laminar model. The effect of axial diffusion is negligible for Peclet numbers greater than 100. Increased plateout is observed for Peclet numbers less than 100; an additional 8% is predicted for a Peclet number of 20 when axial diffusion is included. Graphical presentation is used to depict concentration profile results for the various flow studies in single and multiregion conditions. Fission product deposition measurements for five diffusion tubes in a Fort St. Vrain High-Temperature Gas-Cooled reactor plateout probe are analyzed. Using single region slug and laminar models, the wall mass transfer coefficients, diffusion coefficients, and inlet concentrations are determined using least squares analysis. The diffusion coefficients and inlet concentrations are consistent between tubes. The derived diffusion coefficients and wall mass…
  note: "Major subject: Nuclear Engineering."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. in Philosophy Texas A & M University 1983
  note: Includes bibliographical references (leaves 159-161).
  subject:
    topic: Fission products
    topic: Decay
    topic: Mathematical models
  subject:
    topic: Nuclear Engineering
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-400764
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-400764
  record info:
    record content source: TXA
    record creation date: 860124
    record change date: 20220104090300.0
    record identifier: in00000395093
    language of cataloging:
      language term: eng