Abstract: The development of large-scale green hydrogen industry is a strategic choice to promote the transformation of China's energy structure and achieve the goal of carbon peak and carbon neutrality. Using renewable energy to produce green hydrogen will replace fossil energy to produce hydrogen on a large scale, effectively reduce carbon emissions during energy production and consumption, and support the construction of a new energy system. The green hydrogen industry chain mainly includes the upstream production of green hydrogen, the midstream storage and transportation of green hydrogen and the downstream application of green hydrogen. Based on the analysis of the technological development status of green hydrogen production, storage, transportation and application process, the safety risks existing in all aspects of green hydrogen industry were summarized. From the concept of technologies, standards, policies and regulations, and innovation platforms and so on, the corresponding risk prevention and control suggestions were put forward to lay a solid foundation for the safe utilization of large-scale green hydrogen, to ensure the safe and high-quality development of the green hydrogen industry chain.

Key words: green hydrogen, water electrolysis, hygrogen pipeline, hydrogen embrittlement, safety, risk prevention and control