HIAD Classification of the Physical Effects: Hydrogen Release And Ignition

The sodium chlorate production unit had restarted after a maintenance shutdown phase. The mercury cells had been under nitrogen flushing since the beginning of the shutdown to avoid the presence of…

The event early on a Saturday morning, when the plant was thus practically empty. Nevertheless, the chronology of the accident can be reconstructed from the testimonies of the few operators who were…

The fire broke out in the acid etching tank of the ferric chloride manufacturing unit of a SEVESO-classified chemical plant. In this tank, the attack reaction of the iron metal with hydrochloric acid…

Hydrogen fire at a chlorine chemical production plant (Seveso-classified)Hydrogen ignited in a chlorine electrolyzer unit. The facility was shutdown. The staff of the unit, present on site, triggered…

A leak occurred while loading a semi-trailer carrying hydrogen gas cylinders. An employee closed the supply valve but the leak ignited and reached the trailer's tires. The vehicle caught fire,…

The plant was operating at 92% power when a ground fault on a land steam exhauster caused the supply breaker to a motor control centre (MCC) to trip. This supply breaker could not be reclosed. The…

A hydrogen leak sparked a fire at a power plant, burning a 30-foot hole in the roof. Only one of the plants four turbines were shut down.

A hydrogen fire occurred in a nuclear power plant outside the controlled area. The leaking point was on a pipe system of the distribution circuit of the gas network (6 bar nominal working pressure…

The vent occurred outside a fuel cells manufacturing facility. While preparing for transfer of liquid hydrogen from tanker truck to storage tank, a release of hydrogen occurred, which vaporized into…

A 2-inch line carrying hydrogen gas at approximately 2,800 psi (approximately 19.3 MPa) failed at a weld, resulting in a high pressure hydrogen fire. The fire resulted in flame impingement on the…

A lorry loaded with gaseous hydrogen cylinders caught fire and shut a motorway.No one has been injured.

The fire occurred after a hydrogen released from a venting valve opened for inspection. The hydrogen was at 300 bar and 300C centigrade. The hydrogen ignited probably spontaneously and killed 4…

A malfunction in the turbine generator resulted in a fire and caused the operators to manually shut the reactor. The turbine generator transforms steam into electricity and hydrogen is used as a…

A hydrogen leak occurred on the hydrogen line of a hydro-desulfurization unit, followed by ignition . The failure was located on a supply manifold of the unit at a support beam. The unit was shut…

Hydrogen leaked from an analyser and ignited .On-site staff isolate the leak. As the leak was very quickly isolated, the amount of hydrogen released was negligible. Event no. 35501 of the French…

The hydrogen jet fire a pipe have been detected by a night operator which was making rounds in a solvent production unit. The unit's emergency response team managed the fire in minutes. Operators…

Three workers were working in the sulfur recovery unit (SRU), trying to restore the hydrogen flow. The workers were trying to isolate the cause of a flow problem: hydrogen was entering the…

A detonation was heard and the hydrogen supply of the site was automatically shut down by the safety devices.The fire was caused by a hydrogen leak and led to the formation of a fireball at the end…

The fire occurred around 13:20 on three cells of the chlorine manufacturing unit. A leak of hydrogen in the electrolysis room was at the origin of the fire; the ignition of the H2 cloud caused a…

The fire occurred on a flange of a hydrogen supply line to a desulfurization reactor unit of diesel, which leaked and ignited (30 cm flame) The leak was stopped by isolating the part of line…