AUTHOR=Deng Jian , Zhu Dahuan , Luo Yuejian , Sun Hongping , Zhang Ming , Liu Lili , Xiang Qingan , Wu Xiaoli , Xu Youyou , Xiong Qingwen 

TITLE=Coupled Analysis of Heat Transfer in a Molten Pool With Three-Layer Configuration

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.915450

DOI=10.3389/fenrg.2022.915450

ISSN=2296-598X

ABSTRACT=Understanding reliable description of the heat transfer in molten pool with three layers configuration is inevitable for the design of severe accident mitigation measures in research reactors, such as IVR-ERVC. However, investigations on thick lower metallic layer are scarce. Thus, further studies on heat transfer in molten pool with thick lower metallic layer are highly required, based on previous severe accident studies in light water reactors. This paper conducts numerical simulation of heat transfer in molten pool with thick lower metallic layer during severe accident, combining model development, code verification, and code application. Firstly, MPCAP code has been develop, based on the coupled simulation of natural convection inside molten pool, two-dimensional heat conduction in RPV lower head and convection outside reactor vessel wall. Then, a verification case has been conducted using three layers configuration in AP1000. The AP1000 verification case indicates that MPCAP code predicts important parameters in molten pool well.