Resonance Parameter Adjustment Based on Integral Experiments

doi:10.13182/NSE15-50

Title: Resonance Parameter Adjustment Based on Integral Experiments

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Abstract

Our project seeks to allow coupling of differential and integral data evaluation in a continuous-energy framework and to use the generalized linear least-squares (GLLS) methodology in the TSURFER module of the SCALE code package to update the parameters of a resolved resonance region evaluation. We recognize that the GLLS methodology in TSURFER is identical to the mathematical description of a Bayesian update in SAMMY, the SAMINT code was created to use the mathematical machinery of SAMMY to update resolved resonance parameters based on integral data. Traditionally, SAMMY used differential experimental data to adjust nuclear data parameters. Integral experimental data, such as in the International Criticality Safety Benchmark Experiments Project, remain a tool for validation of completed nuclear data evaluations. SAMINT extracts information from integral benchmarks to aid the nuclear data evaluation process. Later, integral data can be used to resolve any remaining ambiguity between differential data sets, highlight troublesome energy regions, determine key nuclear data parameters for integral benchmark calculations, and improve the nuclear data covariance matrix evaluation. Moreover, SAMINT is not intended to bias nuclear data toward specific integral experiments but should be used to supplement the evaluation of differential experimental data. Using GLLS ensures proper weight is givenmore » to the differential data.« less

Authors:

Sobes, Vladimir ^[1]; Leal, Luiz ^[1]; Arbanas, Goran ^[1]; Forget, Benoit ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Publication Date:: 2016-06-02

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1319156

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Science and Engineering

Additional Journal Information:: Journal Volume: 183; Journal Issue: 3; Journal ID: ISSN 0029-5639

Publisher:: American Nuclear Society

Country of Publication:: United States

Language:: English

Subject:: 97 MATHEMATICS AND COMPUTING; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear data evaluation; differential and integral experimental data; coupled in continuous-energy

Citation Formats


                    Sobes, Vladimir, Leal, Luiz, Arbanas, Goran, and Forget, Benoit. Resonance Parameter Adjustment Based on Integral Experiments.  United States: N. p., 2016. 
        Web.  doi:10.13182/NSE15-50.

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                    Sobes, Vladimir, Leal, Luiz, Arbanas, Goran, & Forget, Benoit. Resonance Parameter Adjustment Based on Integral Experiments.  United States.  doi:10.13182/NSE15-50.

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                    Sobes, Vladimir, Leal, Luiz, Arbanas, Goran, and Forget, Benoit. Thu .  
        "Resonance Parameter Adjustment Based on Integral Experiments".  United States.  doi:10.13182/NSE15-50.  https://www.osti.gov/servlets/purl/1319156.

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@article{osti_1319156,

  title        = {Resonance Parameter Adjustment Based on Integral Experiments},

  author       = {Sobes, Vladimir and Leal, Luiz and Arbanas, Goran and Forget, Benoit},

  abstractNote = {Our project seeks to allow coupling of differential and integral data evaluation in a continuous-energy framework and to use the generalized linear least-squares (GLLS) methodology in the TSURFER module of the SCALE code package to update the parameters of a resolved resonance region evaluation. We recognize that the GLLS methodology in TSURFER is identical to the mathematical description of a Bayesian update in SAMMY, the SAMINT code was created to use the mathematical machinery of SAMMY to update resolved resonance parameters based on integral data. Traditionally, SAMMY used differential experimental data to adjust nuclear data parameters. Integral experimental data, such as in the International Criticality Safety Benchmark Experiments Project, remain a tool for validation of completed nuclear data evaluations. SAMINT extracts information from integral benchmarks to aid the nuclear data evaluation process. Later, integral data can be used to resolve any remaining ambiguity between differential data sets, highlight troublesome energy regions, determine key nuclear data parameters for integral benchmark calculations, and improve the nuclear data covariance matrix evaluation. Moreover, SAMINT is not intended to bias nuclear data toward specific integral experiments but should be used to supplement the evaluation of differential experimental data. Using GLLS ensures proper weight is given to the differential data.},

  doi          = {10.13182/NSE15-50},

  journal      = {Nuclear Science and Engineering},

  number       = 3,

  volume       = 183,

  place        = {United States},

  year         = {2016},

  month        = {6}

}

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