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Perturbation Theory-Based Whole-Core Eigenvalue Sensitivity and Uncertainty (SU) Analysis via a 2D1D Transport Code
Joint Authors
Hao, Chen
Ma, Ji
Liu, Lixun
Zhou, Yuekai
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-01
Country of Publication
Egypt
No. of Pages
13
Abstract EN
For nuclear reactor physics, uncertainties in the multigroup cross sections inevitably exist, and these uncertainties are considered as the most significant uncertainty source.
Based on the home-developed 3D high-fidelity neutron transport code HNET, the perturbation theory was used to directly calculate the sensitivity coefficient of keff to the multigroup cross sections, and a reasonable relative covariance matrix with a specific energy group structure was generated directly from the evaluated covariance data by using the transforming method.
Then, the “Sandwich Rule” was applied to quantify the uncertainty of keff.
Based on these methods, a new SU module in HNET was developed to directly quantify the keff uncertainty with one-step deterministic transport methods.
To verify the accuracy of the sensitivity and uncertainty analysis of HNET, an infinite-medium problem and the 2D pin-cell problem were used to perform SU analysis, and the numerical results demonstrate that acceptable accuracy of sensitivity and uncertainty analysis of the HNET are achievable.
Finally, keff SU analysis of a 3D minicore was analyzed by using the HNET, and some important conclusions were also drawn from the numerical results.
American Psychological Association (APA)
Ma, Ji& Hao, Chen& Liu, Lixun& Zhou, Yuekai. 2020. Perturbation Theory-Based Whole-Core Eigenvalue Sensitivity and Uncertainty (SU) Analysis via a 2D1D Transport Code. Science and Technology of Nuclear Installations،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1209544
Modern Language Association (MLA)
Ma, Ji…[et al.]. Perturbation Theory-Based Whole-Core Eigenvalue Sensitivity and Uncertainty (SU) Analysis via a 2D1D Transport Code. Science and Technology of Nuclear Installations No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1209544
American Medical Association (AMA)
Ma, Ji& Hao, Chen& Liu, Lixun& Zhou, Yuekai. Perturbation Theory-Based Whole-Core Eigenvalue Sensitivity and Uncertainty (SU) Analysis via a 2D1D Transport Code. Science and Technology of Nuclear Installations. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1209544
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1209544