Study on Core Melt Process for a 1000MW Reactor by External Reactor Vessel Cooling
In-Vessel Retention (IVR) is an important and crucial measure for preventing and mitigating the consequence of severe accidents. And in IVR effectiveness evaluation of nuclear power plant, it is a very important step to determine the probability distribution functions of three key uncertain parameters (decay power, mass of metal layer and zirconium oxidation fraction) in the debris pool 1. On the other hand, the distribution functions of these parameters are highly relying on the melt process of core. So it is necessary to study the core melt process of a reactor with external reactor vessel cooling (ERVC). In this paper, severe accident sequences analysis and core melt process related research for IVR effectiveness evaluation of a 1000MW nuclear reactor of China has carried out. This study chooses three severe accident sequences which are related to IVR effectiveness evaluation according to relevant criteria. And use a severe accident analysis code calculates these sequences. The change of state of debris pool in lower head has been shown from results of calculation. And three “quasi-steady states are found from the calculation results (two of which are threat to the integrity of RPV).
IVR-ERVC severe accidents core melt
FU Xiaoliang YANG Yanhua
State Nuclear Power Software Development Center, China No.17 Financial Street, Xicheng District, Bei School of Nuclear Science and Engineering, Shanghai Jiao Tong University 800＃ Dongchuan Road Shangha
国际会议
上海
英文
730-740
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）