Performance of a neutron transport code with full phase space decomposition on the Cray Research T3D

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We present performance results obtained on a 128-node Cray Research T3D computer by a neutron transport code implementing a standard mtiltigroup, discrete ordinates algorithm on a three-dimensional Cartesian grid. After summarizing the implementation strategy used to obtain a full decomposition of phase space (i.e., simultaneous parallelization of the neutron energy, directional and spatial variables), we investigate the scalability of the fundamental source iteration step with respect to each phase space variable. We also describe enhancements that have enabled performance rates approaching 10 gigaflops on the full 128-node machine.

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10 p.

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Dorr, M.R. & Salo, E.M. January 1, 1995.

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Description

We present performance results obtained on a 128-node Cray Research T3D computer by a neutron transport code implementing a standard mtiltigroup, discrete ordinates algorithm on a three-dimensional Cartesian grid. After summarizing the implementation strategy used to obtain a full decomposition of phase space (i.e., simultaneous parallelization of the neutron energy, directional and spatial variables), we investigate the scalability of the fundamental source iteration step with respect to each phase space variable. We also describe enhancements that have enabled performance rates approaching 10 gigaflops on the full 128-node machine.

Physical Description

10 p.

Notes

INIS; OSTI as DE96000335

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  • International conference on mathematics and computations, reactor physics, and environmental analyses, Portland, OR (United States), 30 Apr - 4 May 1995

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  • Other: DE96000335
  • Report No.: UCRL-JC--119752
  • Report No.: CONF-950420--32
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/109679 | External Link
  • Office of Scientific & Technical Information Report Number: 109679
  • Archival Resource Key: ark:/67531/metadc622373

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 17, 2016, 3:18 p.m.

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Dorr, M.R. & Salo, E.M. Performance of a neutron transport code with full phase space decomposition on the Cray Research T3D, report, January 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc622373/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.