A Two-Step Approach to Uncertainty Quantification of Core Simulators
Joint Authors
Yankov, Artem
Zwermann, Winfried
Downar, Thomas J.
Collins, Benjamin S.
Pautz, Andreas
Jessee, Matthew A.
Velkov, Kiril
Klein, Markus
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-12-24
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
For the multiple sources of error introduced into the standard computational regime for simulating reactor cores, rigorous uncertainty analysis methods are available primarily to quantify the effects of cross section uncertainties.
Two methods for propagating cross section uncertainties through core simulators are the XSUSA statistical approach and the “two-step” method.
The XSUSA approach, which is based on the SUSA code package, is fundamentally a stochastic sampling method.
Alternatively, the two-step method utilizes generalized perturbation theory in the first step and stochastic sampling in the second step.
The consistency of these two methods in quantifying uncertainties in the multiplication factor and in the core power distribution was examined in the framework of phase I-3 of the OECD Uncertainty Analysis in Modeling benchmark.
With the Three Mile Island Unit 1 core as a base model for analysis, the XSUSA and two-step methods were applied with certain limitations, and the results were compared to those produced by other stochastic sampling-based codes.
Based on the uncertainty analysis results, conclusions were drawn as to the method that is currently more viable for computing uncertainties in burnup and transient calculations.
American Psychological Association (APA)
Yankov, Artem& Collins, Benjamin S.& Klein, Markus& Jessee, Matthew A.& Zwermann, Winfried& Velkov, Kiril…[et al.]. 2012. A Two-Step Approach to Uncertainty Quantification of Core Simulators. Science and Technology of Nuclear Installations،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-497130
Modern Language Association (MLA)
Yankov, Artem…[et al.]. A Two-Step Approach to Uncertainty Quantification of Core Simulators. Science and Technology of Nuclear Installations No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-497130
American Medical Association (AMA)
Yankov, Artem& Collins, Benjamin S.& Klein, Markus& Jessee, Matthew A.& Zwermann, Winfried& Velkov, Kiril…[et al.]. A Two-Step Approach to Uncertainty Quantification of Core Simulators. Science and Technology of Nuclear Installations. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-497130
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-497130