In the framework of the R&D effort for the assessment of the DTT First Wall (FW), a number of small-scale FW mock-ups, applying the Selective Laser Melting (SLM) technology, has been delivered (Fig. 1).
In DTT, and in all the future fusion power plants, the FW will have to absorb a large part of the heat released by the plasma; the complex cooling system with which it must be equipped and the high thermo-structural resistance it must possess make the design of the FW very challenging.
SLM, which is an Additive Manufacturing process capable of realizing high-performance components with high geometrical precision, has been identified as a well-suited technique for the FW fabrication.
As a secondary but equally important fallout, this activity will also contribute to qualifying the SLM technique for nuclear applications.
The mock-ups realized so far will allow DTT to confirm the validity of the conceptual design and of the technologies available in the market for the first wall manufacturing.
