Every release resulting from a loss of confinement by a component designed for hydrogen. For example:
• a rupture of a hydrogen-carrying piping,
• H2 release from a trailer/truck, from a FCEV, from a reactor using syngas, etc.
• A hydrogen release from a tube trailer or a LH2 tanker.
• Metal embrittlement due to hydrogen attack is a hydrogen-system-initiating event, if hydrogen is present as part of the system.
