An assessment of the MCNP4C weight window

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Description

A new, enhanced weight window generator suite has been developed for MCNP version 4C. The new generator correctly estimates importances in either a user-specified, geometry-independent, orthogonal grid or in MCNP geometric cells. The geometry-independent option alleviates the need to subdivide the MCNP cell geometry for variance reduction purposes. In addition, the new suite corrects several pathologies in the existing MCNP weight window generator. The new generator is applied in a set of five variance reduction problems. The improved generator is compared with the weight window generator applied in MCNP4B. The benefits of the new methodology are highlighted, along with a ... continued below

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Medium: P; Size: 81 pages

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Culbertson, Christopher N. & Hendricks, John S. December 1, 1999.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 12 times . More information about this report can be viewed below.

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  • Los Alamos National Laboratory
    Publisher Info: Los Alamos National Lab., Los Alamos, NM (United States)
    Place of Publication: Los Alamos, New Mexico

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Description

A new, enhanced weight window generator suite has been developed for MCNP version 4C. The new generator correctly estimates importances in either a user-specified, geometry-independent, orthogonal grid or in MCNP geometric cells. The geometry-independent option alleviates the need to subdivide the MCNP cell geometry for variance reduction purposes. In addition, the new suite corrects several pathologies in the existing MCNP weight window generator. The new generator is applied in a set of five variance reduction problems. The improved generator is compared with the weight window generator applied in MCNP4B. The benefits of the new methodology are highlighted, along with a description of its limitations. The authors also provide recommendations for utilization of the weight window generator.

Physical Description

Medium: P; Size: 81 pages

Notes

INIS; OSTI as DE00752368

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  • Other Information: PBD: 1 Dec 1999

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  • Report No.: LA-13668
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/752368 | External Link
  • Office of Scientific & Technical Information Report Number: 752368
  • Archival Resource Key: ark:/67531/metadc712183

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  • December 1, 1999

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

Description Last Updated

  • March 11, 2016, 1:19 p.m.

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Culbertson, Christopher N. & Hendricks, John S. An assessment of the MCNP4C weight window, report, December 1, 1999; Los Alamos, New Mexico. (digital.library.unt.edu/ark:/67531/metadc712183/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.