1. State Key Laboratory of Multiphase Flow in Power Engineering; Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
2. School of Nuclear Science and Technology; Xi'an Jiaotong University, Xi'an; Shaanxi 710049 China
3. Institute of Energy, Environment and Economics; Tsinghua University; Beijing 100084 China
4. CNEC High Temperature Reactor Holdings Co., Ltd; No. 31, Zhongguancun South Street, Haidian District Beijing 10081 China