Task 3.3: Containment System Material Testing and Approval-Progress update

Significant progress has been achieved in the material characterization phase of the project. For Task 3.3, led by School of Naval Architecture and Marine Engineering/NTUA, Deliverable D3.2 (Part B) has been formally issued following the successful incorporation of ABS comments, and a finalized testing plan is now in place. The procurement and preparation of metallic materials are well advanced: stainless-steel plates from Korea have arrived at School of Naval Architecture and Marine Engineering/NTUA and are currently being tested, while the welded specimens have arrived and are being machined. On the testing front, RT, LT, and CT (Room, Low, Cryogenic Temperature) tensile tests are completed, as are some SSRT (Slow Strain Rate Tests) at RT, LT and CT, by School of Naval Architecture and Marine Engineering/NTUA, AAC and IFAM (the latter two subcontractors) for various pre-treatments. Notably, while LH2 immersion at Technische Universität Dresden (TUD) confirmed no hydrogen uptake over 15 days via TDS analysis, an alternative cathodic hydrogen-charging procedure was approved by ABS. Fatigue testing at RT was assigned to TUD and the test will start soon. Currently, work is focused on hydrogen-charging at School of Naval Architecture and Marine Engineering/NTUA and processing results from selected testing subcontractors.