Study on creep-fatigue life of ODS-Cu as heat sink in divertor PFU

doi:10.1016/j.fusengdes.2023.114011

	Study on creep-fatigue life of ODS-Cu as heat sink in divertor PFU
	Zhang, Feng 2; Liu, Peng 1; Wang, Guodong 2; Cao, Qing 2; Mao, Xin 1; Peng, Xuebing 1; Zhang, Liming 1; Chen, Changqi 2
刊名	FUSION ENGINEERING AND DESIGN
	2023-11-01
卷号	196
关键词	Divertor ODS-Cu Heat sink Creep-fatigue damage Stress relaxation
ISSN号	0920-3796
DOI	10.1016/j.fusengdes.2023.114011
通讯作者	Liu, Peng(liupeng@ipp.ac.cn)
英文摘要	In fusion devices, the actively cooled W-monoblocks of the PFUs (Plasma Facing Units) are installed in the divertor to protect the vacuum vessel and magnets against neutron flux in the bottom region of the vessel. Copper alloy is considered to be the ideal heat sink material due to its high thermal conductivity and sufficient mechanical strength, in which ODS (oxide dispersion-strengthened)-Cu is selected as a candidate. With the increasing of operating parameters, such as higher heat flux (-20 MW/m2, H-mode) and longer pulse (up to 2.00 h) in EU-DEMO [1], the heat sink structure will undergo thermal creep induced by high temperature, stress and long holding time, which accelerates fatigue failure and could potentially be a very critical issue for the long-term safe operation of the fusion reactor. In this paper, an ITER-like monoblock with ODS-Cu as heat sink was studied for its creep fatigue life under DEMO operation conditions. The temperature distribution and stress/strain results of ODS-Cu were determined using finite element analysis. The investigation shows that high temperature creep occurs at the heat sink. Based on a damage accumulation model, the predicted life of the PFUs for the divertor are investigated at different operating modes. The analysis provides theoretical feasibility for selecting ODS-Cu as a heat sink material. The effect of stress relaxation on creep behavior during thermal stress cycle was also demonstrated and this was compared with the same for CuCrZr.
资助项目	Anhui Provincial Natural Science Foundation[2208085QA21] ; Anhui Provincial Natural Science Foundation[2208085J49] ; China Postdoctoral Science Foundation[2022M713189]
WOS关键词	COPPER ; DESIGN ; BEHAVIOR ; ALLOYS ; ITER
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:001080235500001
资助机构	Anhui Provincial Natural Science Foundation ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/133505]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Peng
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Hefei Univ Technol, Sch Mech Engn, Hefei 230009, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Feng,Liu, Peng,Wang, Guodong,et al. Study on creep-fatigue life of ODS-Cu as heat sink in divertor PFU[J]. FUSION ENGINEERING AND DESIGN,2023,196.
APA	Zhang, Feng.,Liu, Peng.,Wang, Guodong.,Cao, Qing.,Mao, Xin.,...&Chen, Changqi.(2023).Study on creep-fatigue life of ODS-Cu as heat sink in divertor PFU.FUSION ENGINEERING AND DESIGN,196.
MLA	Zhang, Feng,et al."Study on creep-fatigue life of ODS-Cu as heat sink in divertor PFU".FUSION ENGINEERING AND DESIGN 196(2023).