Matrix Formulation of Pebble Circulation in the PEBBED Code

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The PEBBED technique provides a foundation for equilibrium fuel-cycle analysis and optimization in pebble-bed cores in which the fuel elements are continuously flowing and, if desired, recirculating. In addition to the modern analysis techniques used in, or being developed for, the code, PEBBED incorporates a novel nuclide-mixing algorithm that allows for sophisticated recirculation patterns using a matrix generated from basic core parameters. Derived from a simple partitioning of the pebble flow, the elements of the recirculation matrix are used to compute the spatially averaged density of each nuclide at the entry plane from the nuclide densities of pebbles emerging from ... continued below

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Gougar, Hans D; Terry, William Knox & Ougouag, Abderrafi Mohammed-El-Ami April 1, 2002.

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The PEBBED technique provides a foundation for equilibrium fuel-cycle analysis and optimization in pebble-bed cores in which the fuel elements are continuously flowing and, if desired, recirculating. In addition to the modern analysis techniques used in, or being developed for, the code, PEBBED incorporates a novel nuclide-mixing algorithm that allows for sophisticated recirculation patterns using a matrix generated from basic core parameters. Derived from a simple partitioning of the pebble flow, the elements of the recirculation matrix are used to compute the spatially averaged density of each nuclide at the entry plane from the nuclide densities of pebbles emerging from the discharge conus. The order of the recirculation matrix is a function of the flexibility and sophistication of the fuel handling mechanism. This formulation for coupling pebble flow and neutronics enables core design and fuel cycle optimization to be performed by manipulating a few key core parameters. The formulation is amenable to modern optimization techniques.

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  • Report No.: INEEL/EXT-02-00402
  • Grant Number: DE-AC07-99ID-13727
  • DOI: 10.2172/910663 | External Link
  • Office of Scientific & Technical Information Report Number: 910663
  • Archival Resource Key: ark:/67531/metadc880454

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Creation Date

  • April 1, 2002

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 29, 2016, 7:31 p.m.

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Gougar, Hans D; Terry, William Knox & Ougouag, Abderrafi Mohammed-El-Ami. Matrix Formulation of Pebble Circulation in the PEBBED Code, report, April 1, 2002; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc880454/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.