Helium-Hydrogen Synergistic Effects in Structural Materials Under Fusion Neutron Irradiation

Frontiers in Materials

Liuxuan Cao¹  Songqin Xia²  Zhiying Gao³  Qingyuan Liu³  Jia Huang³  Yue Su³  Wei Ge³  Chenxu Wang³  Fengping Luo³  Jianming Xue³  Yugang Wang³  Haocheng Liu⁴ 

[1] College of Energy, Xiamen University, Xiamen, China;School of Nuclear Science and Engineering, North China Eletric Power University, Beijing, China;State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing, China;State Power Investment Corporation Research Institute, Beijing, China;

关键词: advanced nuclear energy system;    fusion neutron irradiation;    transmutation reaction;    helium-hydrogen synergistic effects;    cavity evolution;    swelling;   

DOI  :  10.3389/fmats.2022.849115

来源: DOAJ

【 摘 要 】

In fusion reactors, 14 MeV high-energy neutron irradiation of structural materials will produce large amounts of helium and hydrogen simultaneously with displacement defects. These He and H atoms will interact with displacement defects, leading to He-H synergistic effects and aggravating the irradiation damage. Currently, there exist no available high-flux fusion neutron sources. Additionally, the neutron energy spectrum and the generation of He and H in fission reactors or spallation neutron sources greatly differ from those in fusion reactors. Multi-ion beam irradiation is a promising method to emulate the synergistic effects induced by fusion neutron irradiation. This review summarizes the experimental studies on the He-H synergistic effects, and analyzes the effects of He and H on cavity evolution and swelling under multi-ion beam irradiation. The roles of various experimental factors are also discussed. More systematically controlled experiments are suggested to develop a comprehensive understanding of He-H synergistic effects in structural materials.

【 授权许可】

Unknown