DNV study for EMSA pushes design-first safety case for hydrogen ships
DNV announced on March 12 that it had completed a multi-year study for the European Maritime Safety Agency concluding that hydrogen-fuelled ships will need a design-based safety approach, with secondary enclosures recommended across all hydrogen-carrying components, including those installed on open deck.
The report argues that hydrogen poses a different risk profile from other alternative marine fuels such as LNG. Even small leaks can rapidly form ignitable gas clouds, DNV said, while hydrogen’s low ignition energy and the difficulty of leak detection mean ships will need stronger onboard technical barriers, particularly for leakage management and explosion protection.
DNV also said hydrogen introduces occupational hazards for crews, especially because of its high flammability and the low temperatures required for liquefied storage. The study recommends that seafarers be trained to identify hydrogen-specific risks and respond through clear operating procedures and safety management systems, with human behavior and organizational safety culture treated as part of the control framework.
The work resulted in a final report and a non-mandatory guidance document. DNV said the findings support early-stage safety integration as hydrogen develops as a marine fuel option, even as broader uptake is expected to take time.
Category: Sustainable Marine Fuels
