Global sensitivity analysis for nuclear reactor LBLOCA with time-dependent outputs

Qingwen Xiong, Peng Du, Jian Deng, Daishun Huang, Gongle Song, Libo Qian, Zenghui Wu and Yuejian Luo

Reliability Engineering and System Safety, 2022, vol. 221, issue C

Abstract: The sensitivity analysis plays a key role in the reliability assessment and safety analysis of the reactor accident scenarios. Conventional techniques mainly assess the influences of input parameters on outputs at scalar points. However, the phenomena and parameters vary significantly within the accident phases and it is necessary to consider time-dependent outputs. In this study, a sensitivity analysis technique for time-dependent outputs was implemented. The time-dependent sensitivity measures are obtained by firstly performing certain code calculations, then converting the time-dependent output data into functional data using the B-spline function, followed by aligning the features of the functional curves using the registration strategy, and finally calculating the global sensitivity measure of each input over time. The proposed technique was applied to the analysis of the LOFT large break loss of coolant accident (LBLOCA), and the time-dependent sensitivity measures of 20 inputs on the cladding temperature were acquired and analyzed. Results showed that the proposed technique could well estimate the influences of the important inputs over time, and was applicable to identify the key parameters in nuclear reactor accident transients.

Keywords: Sensitivity analysis; Time-dependent output; Moment-independent; Functional data registration; B-spline; LBLOCA (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0951832022000187
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:221:y:2022:i:c:s0951832022000187

DOI: 10.1016/j.ress.2022.108337

Access Statistics for this article

Reliability Engineering and System Safety is currently edited by Carlos Guedes Soares

More articles in Reliability Engineering and System Safety from Elsevier
Bibliographic data for series maintained by Catherine Liu ().