Pressure wave behavior and its effects on structure under In-box LOCA in a helium-cooled lead lithium blanket of hydrogen fusion reactors

doi:10.1016/j.ijhydene.2020.11.228

	Pressure wave behavior and its effects on structure under In-box LOCA in a helium-cooled lead lithium blanket of hydrogen fusion reactors
	Zhang, Shichao; Wang, Zhen; Chen, Chao; Jia, Jiangtao; Chen, Zhibin
刊名	INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
	2021-02-08
卷号	46
关键词	Breeding blanket Structural stress Pressure wave propagation Fluid-solid interaction Inbox-LOCA
ISSN号	0360-3199
DOI	10.1016/j.ijhydene.2020.11.228
通讯作者	Wang, Zhen(zhen.wang@inest.cas.cn) ; Jia, Jiangtao(jiangtao.jia@inest.cas.cn)
英文摘要	The helium-cooled lead lithium (PbLi) blanket is considered as one of the candidate blanket concepts selected for the hydrogen fusion DEMO reactors and beyond, which has the advantages of simple structure, strong heat removal capacity and high tritium breeding ratio. However, due to the harsh environment such as high-energy neutron irradiation, high thermal load and great pressure gradient, there is a high possibility that one or some of the thousands of coolant channels will break in the breeding zone, which is so-called In-box Loss of Coolant Accident (In-box LOCA). When the accident occurs, the high pressure helium will rapidly inject into the lead lithium flow channel, generating a complex two-phase flow and great pressure shock effect, which may cause the peak pressure to exceed the design limit and threaten the integrity of the blanket structure. Therefore, it is of great significance to perform the transient analysis of in-box LOCA to improve the safety of the blanket and avoid the leakage of radioactive materials. In this paper, a two-way coupling model for fluid-solid interaction was established based on the ANSYS Workbench, and the model were validated through the experimental data obtained by injecting the high pressure helium gas into liquid lithium lead. Then the validated model was applied to the transient pressure wave propagation analysis and structural stress analysis of the Dual-Functional Lithium Lead (DFLL) blanket in order to explore the integrity of blanket structure under In-box LOCA. In addition, the effects of break location on pressure and structural stress was also investigated through six cases. The study found that the transient pressure in the DFLL blanket gone through three stages in any case: step rise, oscillate, and flatten out. Pressure peaks occurred during oscillations and their values were strongly dependent on the break location. The closer to the inlet/outlet, the higher the peak pressure was. The maximum pressure reached more than twice of the inlet pressure (up to similar to 16 MPa). As a result, the structural stress in some local areas has exceeded the allowable limits, and the corresponding suggestions for improvement have also been put forward. This study can provide guidance for safety design, operation and accident mitigation measures of helium-cooled lead lithium blankets. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
资助项目	National Key R&D Program of China[2019YFE0191600] ; National Natural Science Foundation of China[51906249]
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000614913800011
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120248]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Zhen; Jia, Jiangtao
作者单位	Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shichao,Wang, Zhen,Chen, Chao,et al. Pressure wave behavior and its effects on structure under In-box LOCA in a helium-cooled lead lithium blanket of hydrogen fusion reactors[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2021,46.
APA	Zhang, Shichao,Wang, Zhen,Chen, Chao,Jia, Jiangtao,&Chen, Zhibin.(2021).Pressure wave behavior and its effects on structure under In-box LOCA in a helium-cooled lead lithium blanket of hydrogen fusion reactors.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,46.
MLA	Zhang, Shichao,et al."Pressure wave behavior and its effects on structure under In-box LOCA in a helium-cooled lead lithium blanket of hydrogen fusion reactors".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 46(2021).