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

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

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 7 - 2019

YEAR=2019

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2019.00137

DOI=10.3389/fenrg.2019.00137

ISSN=2296-598X

ABSTRACT=A theoretical model for predicting forced convective critical heat flux (CHF) in rod bundles was proposed, which is based on the bubble crowding phenomenon. The theoretical model applied to the rod bundle is based on the Weisman-Pei's basic tube model. In order to make it suitable for Pressurized Water Reactor (PWR) in rod bundles, the flow and heat transfer characteristics of rod bundles are considered, including velocity distribution, flow patterns, grid effect on CHF and turbulent intensity. The theoretical model has been applied together with the subchannel code ATHAS for assessing against uniformly heated CHF data obtained through a 5x5 rod bundle, and good agreement has been observed.