Influence of active and passive equipment for advanced pressurized water reactor on thermal hydraulic and source term behavior in severe accidents

作     者：Jishen Li Bin Zhang 

作者机构：School of Nuclear Science and TechnologyXi’an Jiaotong UniversityXi’an710049China State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an710049China 

出 版 物：《Energy Storage and Saving》 (储能与节能（英文）)

年 卷 期：2023年第2卷第1期

页      面：392-402页

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the National Key Research and Development Program of China(Grant No.:2019YFE0191600) 

主　　题：Nuclear safety LBLOCA Severe accident Source term HPR1000 Active and passive equipment 

摘      要：Extensive studies have been carried out on the behavior of core degradation and fission products of common pressurized water reactors(PWRs).However,few of them have investigated the relationship between thermal hydraulic and fission product behavior in advanced passive *** to the impact of thermal hydraulic be-haviors in different accident sequences on the release and transportation of fission products,an integrated severe accident analysis(ISAA)code with highly coupled thermal hydraulic and source term calculations is required to simultaneously analyze thermal hydraulic and source term *** advanced passive PWRs,important safety systems that may affect the behavior of the core and fission products should be *** is therefore necessary to simulate the thermal hydraulic and fission product behavior of advanced passive *** this study,the ISAA code is adopted to simulate the occurrence of a hypothetical double ended cold leg LBLOCA of HPR1000 in three scenarios of equipment *** results show that the high-temperature fuel rods and cladding ma-terials exhibit delayed failure at the lower position of the active core,whereas earlier failure at higher position during the *** and passive equipment affects fuel temperature,the oxidation conditions of the fuel,the interaction of fission products and structural materials,and the state of the fuel,thereby affecting the release of fission products in the ***1000 only relies on passive equipment to relieve the core degradation in severe accidents,realize the in-vessel retention of melt,and eliminate the ex-vessel release possibility of fission *** is hoped that the results can provide references for HPR1000 to formulate the severe accident management guidelines(SAMG).