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Title: Verification of the Monte Carlo differential operator technique for MCNP{trademark}

Abstract

The differential operator perturbation technique has been incorporated into the Monte Carlo N-Particle transport code MCNP and will become a standard feature of future releases. This feature includes first and second order terms of the Taylor series expansion for response perturbations related to cross-section data (i.e., density, composition, etc.). Perturbation and sensitivity analyses can benefit from this technique in that predicted changes in one or more tally responses may be obtained for multiple perturbations in a single run. The user interface is intuitive, yet flexible enough to allow for changes in a specific microscopic cross section over a specified energy range. With this technique, a precise estimate of a small change in response is easily obtained, even when the standard deviation of the unperturbed tally is greater than the change. Furthermore, results presented in this report demonstrate that first and second order terms can offer acceptable accuracy, to within a few percent, for up to 20-30% changes in a response.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
221051
Report Number(s):
LA-13098
ON: DE96008817; TRN: 96:012173
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Feb 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; M CODES; VERIFICATION; NEUTRAL-PARTICLE TRANSPORT; MATHEMATICAL OPERATORS; NEUTRON TRANSPORT; PHOTON TRANSPORT; SERIES EXPANSION; CROSS SECTIONS; RESPONSE FUNCTIONS

Citation Formats

McKinney, G W, and Iverson, J L. Verification of the Monte Carlo differential operator technique for MCNP{trademark}. United States: N. p., 1996. Web. doi:10.2172/221051.
McKinney, G W, & Iverson, J L. Verification of the Monte Carlo differential operator technique for MCNP{trademark}. United States. https://doi.org/10.2172/221051
McKinney, G W, and Iverson, J L. 1996. "Verification of the Monte Carlo differential operator technique for MCNP{trademark}". United States. https://doi.org/10.2172/221051. https://www.osti.gov/servlets/purl/221051.
@article{osti_221051,
title = {Verification of the Monte Carlo differential operator technique for MCNP{trademark}},
author = {McKinney, G W and Iverson, J L},
abstractNote = {The differential operator perturbation technique has been incorporated into the Monte Carlo N-Particle transport code MCNP and will become a standard feature of future releases. This feature includes first and second order terms of the Taylor series expansion for response perturbations related to cross-section data (i.e., density, composition, etc.). Perturbation and sensitivity analyses can benefit from this technique in that predicted changes in one or more tally responses may be obtained for multiple perturbations in a single run. The user interface is intuitive, yet flexible enough to allow for changes in a specific microscopic cross section over a specified energy range. With this technique, a precise estimate of a small change in response is easily obtained, even when the standard deviation of the unperturbed tally is greater than the change. Furthermore, results presented in this report demonstrate that first and second order terms can offer acceptable accuracy, to within a few percent, for up to 20-30% changes in a response.},
doi = {10.2172/221051},
url = {https://www.osti.gov/biblio/221051}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 1996},
month = {Thu Feb 01 00:00:00 EST 1996}
}