Investigation on effects of tritium release behavior in Li4SiO4 pebbles

doi:10.1016/j.nme.2021.101036

	Investigation on effects of tritium release behavior in Li4SiO4 pebbles
	Qi, Qiang 1,5; Zhao, Mingzhong 3; Sun, Fei 3; Zhang, Yingchun 4; Gu, Shouxi 1,2; Ji, Baolong 1,2; Zhou, Hai-Shan 1; Oya, Yasuhisa 3; Liu, Songlin 1; Luo, Guang-Nan 1
刊名	NUCLEAR MATERIALS AND ENERGY
	2021-09-01
卷号	28
关键词	Nuclear fusion Tritium Neutron irradiation Li4SiO4 Porosity
DOI	10.1016/j.nme.2021.101036
通讯作者	Zhou, Hai-Shan(haishanzhou@ipp.ac.cn)
英文摘要	For deuterium-tritium fusion reactor, the fuel of tritium is not available naturally. Tritium should be produced by the reaction of Li (n, alpha) T. Li4SiO4 is one of promising candidates due to its high lithium density. In present work, effects of tritium release behavior from Li4SiO4 have been investigated and compared. The main release peak at lower temperature was attributed to tritium located on/near the grain surface and chemical adsorption on pore surface. The small peak at higher temperature was designated as tritium diffusion from grain including lattice and boundary. The tritium release behavior was simulated by diffusion model and surface reaction model. Tritium behavior is controlled by both diffusion and surface reaction for different stages. Based on the desorption theory, the kinetic parameters were obtained. The effects on tritium release behavior were studied. The porosity has significant effects on tritium release. Higher porosity has large specific surface providing more activation sites and fast channels for tritium release which results in lower temperature of tritium release. The main tritium release form was considered as tritium water. The release peak of deuterium moved towards lower temperature after adsorbing water vapor for 1800 h. It was demonstrated that adsorbing water was beneficial for tritium release due to isotope exchange. Compared the effects of porosity and water vapor, higher porosity has larger effects on tritium release in the present work. Based on the work, the tritium release is controlled by both diffusion and surface reaction at different stage and affected by comprehensive effects including porosity and adsorption water.
资助项目	National MCF Energy RD Program[2018YFE0307103] ; Chinese Academy of Sciences[2018484] ; National Natural Science Foundation of China[11605230] ; National Natural Science Foundation of China[51372017]
WOS关键词	CERAMIC PEBBLES ; GRAIN ; KINETICS ; BED
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000691495500001
资助机构	National MCF Energy RD Program ; Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125263]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhou, Hai-Shan
作者单位	1.Chinese Acad Sci, HFIPS, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Shizuoka Univ, Suruga Ku, 836 Ohya, Shizuoka 4228529, Japan 4.Univ Sci & Technol Beijing, Beijing 100083, Peoples R China 5.Anhui Prov Key Lab Special Welding Technol, Huainan 232000, Peoples R China
推荐引用方式 GB/T 7714	Qi, Qiang,Zhao, Mingzhong,Sun, Fei,et al. Investigation on effects of tritium release behavior in Li4SiO4 pebbles[J]. NUCLEAR MATERIALS AND ENERGY,2021,28.
APA	Qi, Qiang.,Zhao, Mingzhong.,Sun, Fei.,Zhang, Yingchun.,Gu, Shouxi.,...&Luo, Guang-Nan.(2021).Investigation on effects of tritium release behavior in Li4SiO4 pebbles.NUCLEAR MATERIALS AND ENERGY,28.
MLA	Qi, Qiang,et al."Investigation on effects of tritium release behavior in Li4SiO4 pebbles".NUCLEAR MATERIALS AND ENERGY 28(2021).