Design approach for the main ITER test blanket modules for the EU helium cooled lithium–lead blankets

One of the two blanket concepts developed by the EU for testing in ITER is the helium cooled lithium–lead (HCLL) concept. Four types of HCLL test blanket modules are defined in a way that they will provide a progressive qualification of the HCLL blanket line up to an integral demonstration in the final TBM. In this paper the latest design of the final TBM is presented. The most recent developments consist in geometrical optimisations and modifications needed to have a realistic manufacturing sequence, in defining the attachments to the port frame, and in assessing the integration of the testing instrumentation required for each mock-up. The status of studies on sub-components fabrication is presented. Preliminary proposals for the design of the initial TBM are also discussed.