TY - JOUR
T1 - Progress on the design development and prototype manufacturing of the ITER In-vessel coils
AU - Encheva, A.
AU - Omran, H.
AU - Devred, A.
AU - Vostner, A.
AU - Mitchell, N.
AU - Mariani, N.
AU - Long, F.
AU - Zhou, C.
AU - Macklin, B.
AU - Marti, H. P.
AU - Sborchia, C.
AU - della Corte, A. Della
AU - Di Zenobio, A.
AU - Anemona, A.
AU - Righetti, R.
AU - Wu, Y.
AU - Jin, H.
AU - Xu, A.
PY - 2017/11
Y1 - 2017/11
N2 - ITER is incorporating two types of In-Vessel Coils (IVCs): ELM Coils to mitigate Edge Localized Modes and VS Coils to provide a reliable Vertical Stabilization of the plasma. Strong coupling with the plasma is required in order that the ELM and VS Coils can meet their performance requirements. Accordingly, the IVCs are mounted on the Vacuum Vessel (VV) inner wall, in close proximity to the plasma, just behind the Blanket Shield Modules (BSM). Due to high radiation environment, mineral insulated copper conductors enclosed in a stainless steel jacket have been selected.The reference design and prototype work provided a good basis for the development of radiation resistant conductor capable of operating within the harsh conditions in ITER vacuum chamber. However, this effort identified shortcomings in achieving satisfactory manufacturing solution, and most significantly, difficulties in brazing the brackets onto the ELM coil conductor. Since this process has not proven successful, alternative designs are under development and prototyping. Prototype manufacturing on the alternative designs has been completed at ICAS, Italy and ASIPP, China. The aim was to eliminate the need for internal coil joints, to prove the principle of longer conductor length manufacturing, and to perform bending and welding trials on two different conductor cross-sections: circular and square.The procurement of the IVCs and their conductors will be done via direct call for tender from the ITER Organization. This paper will give an overview of the alternative design and prototype manufacturing of the ITER In-Vessel coils.
AB - ITER is incorporating two types of In-Vessel Coils (IVCs): ELM Coils to mitigate Edge Localized Modes and VS Coils to provide a reliable Vertical Stabilization of the plasma. Strong coupling with the plasma is required in order that the ELM and VS Coils can meet their performance requirements. Accordingly, the IVCs are mounted on the Vacuum Vessel (VV) inner wall, in close proximity to the plasma, just behind the Blanket Shield Modules (BSM). Due to high radiation environment, mineral insulated copper conductors enclosed in a stainless steel jacket have been selected.The reference design and prototype work provided a good basis for the development of radiation resistant conductor capable of operating within the harsh conditions in ITER vacuum chamber. However, this effort identified shortcomings in achieving satisfactory manufacturing solution, and most significantly, difficulties in brazing the brackets onto the ELM coil conductor. Since this process has not proven successful, alternative designs are under development and prototyping. Prototype manufacturing on the alternative designs has been completed at ICAS, Italy and ASIPP, China. The aim was to eliminate the need for internal coil joints, to prove the principle of longer conductor length manufacturing, and to perform bending and welding trials on two different conductor cross-sections: circular and square.The procurement of the IVCs and their conductors will be done via direct call for tender from the ITER Organization. This paper will give an overview of the alternative design and prototype manufacturing of the ITER In-Vessel coils.
KW - Edge localized modes
KW - Elm
KW - In-Vessel coils
KW - ITER
KW - IVC
KW - Mineral insulated conductor
KW - Procurement
KW - Prototype manufacturing
KW - Vertical stabilization
KW - VS
KW - n/a OA procedure
UR - http://www.scopus.com/inward/record.url?scp=85022012841&partnerID=8YFLogxK
U2 - 10.1016/j.fusengdes.2017.05.127
DO - 10.1016/j.fusengdes.2017.05.127
M3 - Article
AN - SCOPUS:85022012841
VL - 124
SP - 496
EP - 500
JO - Fusion engineering and design
JF - Fusion engineering and design
SN - 0920-3796
ER -