Experimental study of primary and secondary side coupling natural convection heat transfer characteristics of the passive residual heat removal system in AP1000

作     者：Zhimin QIU Daogang LU Jingpin FU Li FENG Yuhao ZHANG Zhimin QIU;Daogang LU;Jingpin FU;Li FENG;Yuhao ZHANG

作者机构：School of Nuclear Science and EngineeringNorth China Electric Power UniversityBeijing 102206China Beijing Key Laboratory of Passive Safety Technology for Nuclear EnergyBeijing 102206China 

出 版 物：《Frontiers in Energy》 (能源前沿（英文版）)

年 卷 期：2021年第15卷第4期

页      面：860-871页

核心收录：

学科分类：082703[工学-核技术及应用] 08[工学] 0827[工学-核科学与技术] 

基　　金：the National Science and Technology Major Project of China(Grant No.2017ZX06004002-006-002) the National Natural Science Foundation of China(Grant No.51906069) 

主　　题：passive residual heat removal heat exchanger(PRHR HX) C-shape tube revised heat transfer correlations coupled natural convection* 

摘      要：Passive residual heat removal heat exchanger(PRHR HX),which is a newly designed equipment in the advanced reactors of AP1000 and CAP1400,plays an important role in critical accidental *** primary and secondary side coupling heat transfer characteristics of the passive residual heat removal system(PRHRS)determine the capacity to remove core decay heat during the ***,it is necessary to investigate the heat transfer characteristics and develop applicable heat transfer formulas for optimized *** the present paper,an overall scaled-down natural circulation loop of PRHRS in AP1000,which comprises a scaleddown in-containment refueling water storage tank(IRWST)and PRHR HX models and a simulator of the reactor core,is built to simulate the natural circulation process in residual heat removal accidents.A series of experiments are conducted to study thermal-hydraulic behaviors in both sides of the miniaturized PRHR HX which is simulated by 12 symmetric arranged C-shape *** the local PRHR HX heat transfer performance,traditional natural convection correlations for both the horizontal and vertical bundles are compared with the experimental data to validate their applicability for the specific heat transfer ***,the revised natural convection heat transfer correlations based on the present experimental data are developed for PRHR HX vertical and lower horizontal *** paper provides essential references for the PRHRS operation and further optimized design.