Qualification of ITER PF6 helium inlet

•Three samples were prepared to qualify the helium inlet manufacturing process before series production started.•ITER PF6 helium inlet qualification was successfully accomplished by meeting all the technical requirements from ITER IO.•The manufacturing procedures of helium inlet fabrication were dev...

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Bibliographic Details
Published in:Fusion engineering and design 2018-09, Vol.134, p.1-4
Main Authors: Du, Shuangsong, Wen, Wei, Shen, Guang, Xin, Jijun, Smith, Kevin, Sborchia, Carlo, Readman, Peter, Song, Yuntao, Wu, WeiYue, Wu, Huan
Format: Article
Language:English
Subjects:
Automatic welding
Coiling
Coils
Critical components
Cyclic loads
Destructive testing
Fatigue test
Fatigue tests
Field coils
Helium
Helium inlet
Inspection
Magnetic fields
Magnets
Nondestructive testing
PF6 coil
Plasma physics
Procurement
Stainless steel
Thermal cycling
Tokamak devices
Tool steels
Welding
Welding machines
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Summary:•Three samples were prepared to qualify the helium inlet manufacturing process before series production started.•ITER PF6 helium inlet qualification was successfully accomplished by meeting all the technical requirements from ITER IO.•The manufacturing procedures of helium inlet fabrication were developed, finalized and approved by ITER IO. The Poloidal Field (PF) coils are one of the main sub-systems of the ITER magnets. The PF6 coil is being manufactured by the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP) as per the Poloidal Field coils cooperation agreement signed between ASIPP and Fusion for Energy (F4E). As one of the critical components, helium inlet locates on the innermost turn and supplies the coil with supercritical helium. During Tokamak operation, the helium inlet will undergo huge cyclic electromagnetic loads and thermal cycling during cooling down and warming up. This paper focus on the main steps of ITER PF6 helium inlet qualification. Helium inlet hole drilling and stainless steel wrapping removal were firstly been carried out. Helium inlet welding with full penetration by automatic welding machine was then performed, followed by leak proof test, non-destructive test, fatigue test and tomography test. At the end, the samples were sectioned for micro and macro inspection. The results show ITER PF6 helium inlet qualification has successfully met the requirements of PF procurement agreement(PA) and was approved by ITER IO.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2018.06.010