1. School of Nuclear Science and Technology, North China Electric Power University, Beijing, P.R. China
2. Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy, North China Electric Power University, Beijing, P.R. China
3. Northwest Institute of Nuclear Technology, Xi’an, P.R. China
4. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, P.R. China
5. Department of Structure Engineering, Nagasaki University, Nagasaki, Japan