Assessment of a Theoretical Model for Predicting Forced Convective Critical Heat Flux in Rod Bundles

Yang Liu; Qian Yin; Jianqiang Shan; Bo Zhang; Wei Liu; L. K. H. Leung

doi:10.3389/fenrg.2019.00137

Frontiers in Energy Research (Dec 2019)

Assessment of a Theoretical Model for Predicting Forced Convective Critical Heat Flux in Rod Bundles

Yang Liu,
Qian Yin,
Jianqiang Shan,
Bo Zhang,
Wei Liu,
L. K. H. Leung

Affiliations

Yang Liu: State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China
Qian Yin: Guangxi Fangchenggang Nuclear Power Co., Ltd, Fangchenggang, China
Jianqiang Shan: State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China
Bo Zhang: State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China
Wei Liu: State Key Laboratory of Reactor System Desgin Technology, Nuclear Power Institute of China, Chengdu, China
L. K. H. Leung: Department of Engineering Physics, McMaster University, Hamilton, ON, Canada

DOI: https://doi.org/10.3389/fenrg.2019.00137
Journal volume & issue: Vol. 7

Abstract

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This study proposes a theoretical model for predicting forced convective critical heat flux (CHF) in rod bundles based on the bubble crowding phenomenon. The theoretical model applied to the rod bundle is based on Weisman-Pei's basic tube model. In order to make it suitable for rod bundles in Pressurized Water Reactors (PWR), the flow and heat transfer characteristics of rod bundles are considered, including velocity distribution, flow patterns, the grid effect on CHF, and turbulence intensity. The theoretical model is applied together with the subchannel code ATHAS to assess it against uniformly heated CHF data obtained from a 5 × 5 rod bundle, and good agreement is observed.

Published in Frontiers in Energy Research

ISSN: 2296-598X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: General Works
Website: https://www.frontiersin.org/journals/energy-research

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