Highly underexpanded helium jet and its effect on dust resuspension under in-vessel loss of coolant accident of fusion reactor

doi:10.1088/1741-4326/ac7df0

	Highly underexpanded helium jet and its effect on dust resuspension under in-vessel loss of coolant accident of fusion reactor
	Qin, Zhijie 1,2; Zhang, Shichao 2; Wang, Zhen 2; Chen, Zhibin 2; Li, Taosheng 2
刊名	NUCLEAR FUSION
	2022-10-01
卷号	62
关键词	in-vessel LOCA highly underexpanded jet Mach disk friction velocity
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac7df0
通讯作者	Zhang, Shichao(shichao.zhang@inest.cas.cn)
英文摘要	During an in-vessel loss of coolant accident (LOCA) of a helium-cooled blanket in a fusion reactor, the high-pressure helium gas ingress into the vacuum vessel (VV) will produce highly underexpanded jet, resulting in the resuspension and migration of the radioactive dust deposited in the VV. In this study, the flow field in the VV and the influence of friction velocity were simulated and analyzed by using ANSYS Fluent code. In addition, the differences between in-vessel LOCA and loss of vacuum accident (LOVA) were compared. The results showed that the pressure of the VV reaches the pressure relief limit of the VV pressure suppression system rapidly after a LOCA. With the development of a LOCA, the Mach disk continued to move towards the equatorial break of the VV, its shape continued to shrink and the number of structures gradually increased. Compared with the LOVA, the LOCA had a higher friction velocity, resulting in a greater probability of dust resuspension and radioactive risk.
资助项目	National Key Research and Development Program of China[2019YFE0191600] ; National Natural Science Foundation of China[51906249]
WOS关键词	NUMERICAL-ANALYSIS ; WAVE
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000843301900001
资助机构	National Key Research and Development 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/334002/132025]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Shichao
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Qin, Zhijie,Zhang, Shichao,Wang, Zhen,et al. Highly underexpanded helium jet and its effect on dust resuspension under in-vessel loss of coolant accident of fusion reactor[J]. NUCLEAR FUSION,2022,62.
APA	Qin, Zhijie,Zhang, Shichao,Wang, Zhen,Chen, Zhibin,&Li, Taosheng.(2022).Highly underexpanded helium jet and its effect on dust resuspension under in-vessel loss of coolant accident of fusion reactor.NUCLEAR FUSION,62.
MLA	Qin, Zhijie,et al."Highly underexpanded helium jet and its effect on dust resuspension under in-vessel loss of coolant accident of fusion reactor".NUCLEAR FUSION 62(2022).