Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Assessment of Realistic Departure from Nucleate Boiling Ratio (DNBR) Considering Uncertainty Quantification of Core Flow Asymmetry

Authors
Lee, Il SukYoon, Dong HyeogBang, Young SeokKim, Tae HoonKim, Yong Chan
Issue Date
3월-2021
Publisher
MDPI
Keywords
departure from nucleate boiling ratio; asymmetry; core flow; nuclear safety; uncertainty
Citation
ENERGIES, v.14, no.5
Indexed
SCIE
SCOPUS
Journal Title
ENERGIES
Volume
14
Number
5
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/49359
DOI
10.3390/en14051504
ISSN
1996-1073
Abstract
Concern over the asymmetric phenomena in the core region has increased considering safety issues that are highly possible to reduce the thermal margin significantly in nuclear power plants. Since the seized reactor coolant pump (RCP) accident of an advanced power reactor 1400 (APR1400) can be regarded as a representative core asymmetric event with respect to core inlet flow, the departure from nucleate boiling ratio (DNBR), which is a regulatory acceptance criterion in nuclear safety, should be evaluated with consideration of the uncertainty range of the core inlet flow reflecting the actual geometry. This study investigates the DNBR quantitatively in the entire fuel assemblies in the core using several codes for system behavior, computational flow dynamics, sub-channel analysis, and uncertainty evaluation. Based on the results from a system thermal-hydraulic analysis of a seized RCP accident of APR1400, this study presents the uncertainty range calculated by computational fluid dynamics on the asymmetry of the core inlet flow. Damaged fuel rods are quantitatively identified through a sub-channel analysis, which presents statistic relevance to obtain the DNBR at 95% reliability and 95% accuracy level. Additionally, an optimized evaluation methodology of a non-loss of coolant accident (non-LOCA) is realized by several nuclear codes.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Mechanical Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher KIM, Yong Chan photo

KIM, Yong Chan
공과대학 (기계공학부)
Read more

Altmetrics

Total Views & Downloads

BROWSE