Extension of SCALE/Sampler’s sensitivity analysis

Bostelmann, Friederike; Wiarda, Dorothea; Arbanas, Goran; Wieselquist, William A.

doi:10.1016/j.anucene.2021.108641

Title: Extension of SCALE/Sampler’s sensitivity analysis

Journal Article · 29 August 2021 · Annals of Nuclear Energy (Oxford)

DOI: https://doi.org/10.1016/j.anucene.2021.108641 · OSTI ID:1820836

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

Nuclear data are a major source of uncertainties in reactor physics calculations. The propagation of nuclear data uncertainties to important system responses is instrumental when determining appropriate safety margins in reactor safety analyses. It is also important to understand the major contributors to the observed uncertainties to make recommendations for further measurements and evaluations and aid in the understanding of the studied system. The SCALE code system allows for nuclear data uncertainty analysis based on the random sampling approach as implemented in SCALE’s Sampler sequence. Sampler was recently extended by a sensitivity analysis in terms of the calculation of two correlation-based sensitivity indices. This analysis allows for the identification of the top contributing nuclear reactions to any analyzed output uncertainty. This paper presents the sensitivity indices, along with their interpretation and limitations. It demonstrates the application in an eigenvalue and decay heat analysis for a boiling water reactor fuel assembly.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1820836

Journal Information:: Annals of Nuclear Energy (Oxford), Journal Name: Annals of Nuclear Energy (Oxford) Journal Issue: 1 Vol. 165; ISSN 0306-4549

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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random sampling
sampler
sensitivity analysis

Title: Extension of SCALE/Sampler’s sensitivity analysis

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