Computational Method for Global Sensitivity Analysis of Reactor Neutronic Parameters
Joint Authors
Bokov, Pavel M.
Adetula, Bolade A.
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-12-17
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
The variance-based global sensitivity analysis technique is robust, has a wide range of applicability, and provides accurate sensitivity information for most models.
However, it requires input variables to be statistically independent.
A modification to this technique that allows one to deal with input variables that are blockwise correlated and normally distributed is presented.
The focus of this study is the application of the modified global sensitivity analysis technique to calculations of reactor parameters that are dependent on groupwise neutron cross-sections.
The main effort in this work is in establishing a method for a practical numerical calculation of the global sensitivity indices.
The implementation of the method involves the calculation of multidimensional integrals, which can be prohibitively expensive to compute.
Numerical techniques specifically suited to the evaluation of multidimensional integrals, namely, Monte Carlo and sparse grids methods, are used, and their efficiency is compared.
The method is illustrated and tested on a two-group cross-section dependent problem.
In all the cases considered, the results obtained with sparse grids achieved much better accuracy while using a significantly smaller number of samples.
This aspect is addressed in a ministudy, and a preliminary explanation of the results obtained is given.
American Psychological Association (APA)
Adetula, Bolade A.& Bokov, Pavel M.. 2012. Computational Method for Global Sensitivity Analysis of Reactor Neutronic Parameters. Science and Technology of Nuclear Installations،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-447170
Modern Language Association (MLA)
Adetula, Bolade A.& Bokov, Pavel M.. Computational Method for Global Sensitivity Analysis of Reactor Neutronic Parameters. Science and Technology of Nuclear Installations No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-447170
American Medical Association (AMA)
Adetula, Bolade A.& Bokov, Pavel M.. Computational Method for Global Sensitivity Analysis of Reactor Neutronic Parameters. Science and Technology of Nuclear Installations. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-447170
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-447170