Geometrically-compatible 3-D Monte Carlo and discrete-ordinates methods

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Description

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The purpose of this project was two-fold. The first purpose was to develop a deterministic discrete-ordinates neutral-particle transport scheme for unstructured tetrahedral spatial meshes, and implement it in a computer code. The second purpose was to modify the MCNP Monte Carlo radiation transport code to use adjoint solutions from the tetrahedral-mesh discrete-ordinates code to reduce the statistical variance of Monte Carlo solutions via a weight-window approach. The first task has resulted in a deterministic transport code that is ... continued below

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12 p.

Creation Information

Morel, J.E.; Wareing, T.A.; McGhee, J.M. & Evans, T.M. December 31, 1998.

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Description

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The purpose of this project was two-fold. The first purpose was to develop a deterministic discrete-ordinates neutral-particle transport scheme for unstructured tetrahedral spatial meshes, and implement it in a computer code. The second purpose was to modify the MCNP Monte Carlo radiation transport code to use adjoint solutions from the tetrahedral-mesh discrete-ordinates code to reduce the statistical variance of Monte Carlo solutions via a weight-window approach. The first task has resulted in a deterministic transport code that is much more efficient for modeling complex 3-D geometries than any previously existing deterministic code. The second task has resulted in a powerful new capability for dramatically reducing the cost of difficult 3-D Monte Carlo calculations.

Physical Description

12 p.

Notes

INIS; OSTI as DE99001120

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  • Other Information: PBD: [1998]

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  • Other: DE99001120
  • Report No.: LA-UR--98-1886
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/304124 | External Link
  • Office of Scientific & Technical Information Report Number: 304124
  • Archival Resource Key: ark:/67531/metadc678620

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Creation Date

  • December 31, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 20, 2016, 2:52 p.m.

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Morel, J.E.; Wareing, T.A.; McGhee, J.M. & Evans, T.M. Geometrically-compatible 3-D Monte Carlo and discrete-ordinates methods, report, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc678620/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.