The project should encompass the following items:

• Development of at least three safe and sustainable-by-design guidelines for systems across the hydrogen value chain providing criteria for the system selected. It is expected that the systems will be selected covering different TRLs levels and different application from hydrogen production, storage, transport, distribution and utilisation;
• Integrate the sustainability guidelines developed by eGHOST project with safety aspects so to obtain SSbD guidelines of at least five FCH systems (2 from eGHOST project + at least 3 from this call);
• Providing guidance, in the guidelines, concerning the following concepts: improvement of energetic and environmental performances, reduction of critical raw materials utilisation, avoiding or minimising the use of virgin critical raw materials, green supply management, and integration of end-of-life management in order to facilitate recovery, reuse, recycle, disassembly and dismantling, following a circular economy approach;
• Integration of safety, economic and social assessments and improvements for FCH systems to achieve comprehensive SSbD guidelines. These aspects need to be integrated with the existing eco-design approaches, which primarily focus on environmental impacts, in order to create a holistic approach to sustainability and safety;
• Incorporation of various methods (e.g., Life Cycle Sustainability Assessment, circularity assessment, material criticality assessment, optimisation techniques) in the development of the guidelines and their application to the selected systems. The guidelines should encompass the following steps at a minimum: defining and evaluating a reference system, generating eco-design ideas, multi-criteria prioritisation of SSbD, defining safe and sustainable-by-design system concepts and evaluating their impact on the different stakeholders of the hydrogen value chain (e.g., industry, research organisations, academia, policy makers). Social Sciences and Humanities (SSH) methods should be used to engage Stakeholders using structured surveys or interviews.