EM analyses on the 55.NE.V0 loom system and attached components

The ITER Vacuum Vessel contains transducers for vessel and blanket instrumentation and for the measurement of plasma performance. The electrical and optical signals to and from these transducers are managed through the electrical services infrastructure project 55.NE.V0. This system is made of around 1400 sensors/junction boxes/connectors and more than 1700 MI cables, distributed throughout the vacuum vessel inner surface. This paper concerns EM analyses performed as part of the full set of engineering analyses necessary to assess the design configuration feasibility and to demonstrate a sustainable impact on the VV, which is a confinement boundary and ESPN equipment. Transient EM analyses were carried out for 4 representative looms systems placed at the inboard and outboard region of the VV. The calculated distributed EM loads along the cables and in attached components allow the most critical positions for connecting clamps and junction boxes to be identified, that were subsequently analyzed with detailed component models, thus obtaining an accurate and detailed geometrical distribution of the most critical EM loads inside these components. All these analyses were made possible also thanks to the development of a dedicated "1d wire element" that made the modeling of the looms cables numerically efficient and manageable.