End of the Winding of the European Poloidal Field Coils for the ITER Project

Fusion for Energy is delivering 5 out of 6 ITER superconducting poloidal field coils (PF coils), which are composed of stacks of 6 to 8 double-layered circular coils - double pancakes (DPs). The double pancakes range from 17 m to 24 m in diameter and the wound conductor has a NbTi core inside a stainless steel squared jacked. Due to the size of the PF 2-4 coils, they have been manufactured on the ITER site, very close to the assembly hall. This article highlights the manufacturing processes, the learning curve, the main challenges and learned lessons during the winding activities of the 30 double pancakes that comprise 4 PF coils.