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Title: Statistical Analysis of PST Types of Experiments Relative to Examining "Safety Applications"

Abstract

Results of simultaneous analysis of plutonium solution critical experiments reported in the International Handbook of Evaluated Criticality Safety Benchmark Experiments (IHECSBE) and corresponding conclusions regarding computational accuracy of simple, example safety applications are given in this paper. A suite of those experiments considered in this paper was formed by a research group at the Institute of Physics and Power Engineering (IPPE) for defining experimental uncertainties and correlation coefficients for experimental parameters. In some cases, reevaluated experimental uncertainties and correlation coefficients were provided. That preliminary information was used with the Oak Ridge National Laboratory's prototypic analytic software, TSURFER (Tool for Sensitivity/Uncertainty analysis of Response Functionals using Experimental Results). TSURFER is to be released in SCALE 6, the follow-on to SCALE 5.1. The TSURFER code uses the generalized linear least-squares method to collectively evaluate previously measured integral responses (e.g., k{sub eff}) and the corresponding computed values of k{sub eff} using the SCALE nuclear analysis code system. TSURFER can vary the nuclear data used in the transport calculations as well as the experimental values themselves, considering correlated uncertainties, to minimize biases between experimental and computed k{sub eff} so that the most self-consistent set of nuclear data and experimentally measured values are obtained. Thereforemore » TSURFER provides the opportunity to examine neutron cross-section energy-reaction importance on the bias and uncertainty of calculations as influenced by both neutron-data and critical-experiment correlation coefficients. TSURFER also calculates a similarity parameter, c{sub k}, that characterizes a degree of similarity for two arbitrary (sub-) critical configurations (e.g., between a measured experiment and a safety evaluation computation).« less

Authors:
 [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
931545
DOE Contract Number:
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 8th International Conference on Nuclear Criticality Safety, St. Petersburg, Russian Fed., 20070528, 20070601
Country of Publication:
United States
Language:
English

Citation Formats

Hopper, Calvin Mitchell, and Raskach, Kirill. Statistical Analysis of PST Types of Experiments Relative to Examining "Safety Applications". United States: N. p., 2007. Web.
Hopper, Calvin Mitchell, & Raskach, Kirill. Statistical Analysis of PST Types of Experiments Relative to Examining "Safety Applications". United States.
Hopper, Calvin Mitchell, and Raskach, Kirill. Mon . "Statistical Analysis of PST Types of Experiments Relative to Examining "Safety Applications"". United States. doi:.
@article{osti_931545,
title = {Statistical Analysis of PST Types of Experiments Relative to Examining "Safety Applications"},
author = {Hopper, Calvin Mitchell and Raskach, Kirill},
abstractNote = {Results of simultaneous analysis of plutonium solution critical experiments reported in the International Handbook of Evaluated Criticality Safety Benchmark Experiments (IHECSBE) and corresponding conclusions regarding computational accuracy of simple, example safety applications are given in this paper. A suite of those experiments considered in this paper was formed by a research group at the Institute of Physics and Power Engineering (IPPE) for defining experimental uncertainties and correlation coefficients for experimental parameters. In some cases, reevaluated experimental uncertainties and correlation coefficients were provided. That preliminary information was used with the Oak Ridge National Laboratory's prototypic analytic software, TSURFER (Tool for Sensitivity/Uncertainty analysis of Response Functionals using Experimental Results). TSURFER is to be released in SCALE 6, the follow-on to SCALE 5.1. The TSURFER code uses the generalized linear least-squares method to collectively evaluate previously measured integral responses (e.g., k{sub eff}) and the corresponding computed values of k{sub eff} using the SCALE nuclear analysis code system. TSURFER can vary the nuclear data used in the transport calculations as well as the experimental values themselves, considering correlated uncertainties, to minimize biases between experimental and computed k{sub eff} so that the most self-consistent set of nuclear data and experimentally measured values are obtained. Therefore TSURFER provides the opportunity to examine neutron cross-section energy-reaction importance on the bias and uncertainty of calculations as influenced by both neutron-data and critical-experiment correlation coefficients. TSURFER also calculates a similarity parameter, c{sub k}, that characterizes a degree of similarity for two arbitrary (sub-) critical configurations (e.g., between a measured experiment and a safety evaluation computation).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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