Selected Topics of Technical Challenges of the ITER Central Solenoid

Central Solenoid (CS) components have an abundance of technical challenges ranging from material science to component interfacing. In manufacturing, a CS module is subjected to stringent high voltage insulation strength tests at multiple occasions. The engineering challenge is where a multitude of quench detection wires need to exit the bulk insulation and the materials boundary or compatibility become an issue. In assembly, each CS module terminals is jumped to its respective feeder line via an extension lead that is manufactured with interfacing constraints with the module terminal vector as well as the feeder terminal mating surface. Another critical aspect is the clearance available in assembly with other surrounding tokamak components. A summary of the issues found in manufacturing of large scale structural components is also given.