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Title: Sensitivity Analysis and Uncertainty Quantification Applied to the Feynman Y and Sm 2

Abstract

Neutron multiplicity counting (NMC) experiments are frequently used to perform non-destructive assay (NDA) of special nuclear material (SNM), but MCNPR© code simulations of the counting distribution that were performed by Miller have revealed over-calibration in the value of the Pu-239ν¯. Mattingly has demonstrated the procedure for deterministic calculations of the counting distribution moments and O’Brien implemented a first-order, adjoint-based sensitivity analysis (SA) methodology applied to the counting distribution moments. In this report, these techniques are used to apply SA/uncertainty quantification (UQ) to the Feynman Y and Sm 2, which are ratios of the counting distribution moments. Sm 2 is less sensitive to the cross sections than Y and therefore has less variance due to covariance in the cross sections than Y.

Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1481111
Report Number(s):
LA-UR-18-30511
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Clark, Alexander Rich. Sensitivity Analysis and Uncertainty Quantification Applied to the Feynman Y and Sm2. United States: N. p., 2018. Web. doi:10.2172/1481111.
Clark, Alexander Rich. Sensitivity Analysis and Uncertainty Quantification Applied to the Feynman Y and Sm2. United States. doi:10.2172/1481111.
Clark, Alexander Rich. Fri . "Sensitivity Analysis and Uncertainty Quantification Applied to the Feynman Y and Sm2". United States. doi:10.2172/1481111. https://www.osti.gov/servlets/purl/1481111.
@article{osti_1481111,
title = {Sensitivity Analysis and Uncertainty Quantification Applied to the Feynman Y and Sm2},
author = {Clark, Alexander Rich},
abstractNote = {Neutron multiplicity counting (NMC) experiments are frequently used to perform non-destructive assay (NDA) of special nuclear material (SNM), but MCNPR© code simulations of the counting distribution that were performed by Miller have revealed over-calibration in the value of the Pu-239ν¯. Mattingly has demonstrated the procedure for deterministic calculations of the counting distribution moments and O’Brien implemented a first-order, adjoint-based sensitivity analysis (SA) methodology applied to the counting distribution moments. In this report, these techniques are used to apply SA/uncertainty quantification (UQ) to the Feynman Y and Sm2, which are ratios of the counting distribution moments. Sm2 is less sensitive to the cross sections than Y and therefore has less variance due to covariance in the cross sections than Y.},
doi = {10.2172/1481111},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}

Technical Report:

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