HIAD Event Initiating System: Hydrogen System Initiating Event

During functional tests of the system, a major quantity of hydrogen-containing gas was released from an adsorber, followed by its ignition.After the alarm was released the feed of the adsorber was…

On a cold morning, the gasoil hydro-treatement unit was being brought back on line after being out of service to repair a governor problem on the recycle gas compressor. Several upset trips had…

An explosion occurred in the glass components of a reactor at a pharmaceutical plant during a batch process. At the time of the accident, the reactor was being hydrogenated. As a result of the…

"A chlorine suction pump failed on a sodium hydroxide electrolysis unit.Recovery operations were carried out including nitrogen purging of hydrogen piping and air purging of chlorine piping before…

Explosion in a food products plant (Seveso classified)The event occurred in the settling cyclone of a hydrogenation reactor of a starch production unit. The process consists in introducing the starch…

A major leak (estimated between 1.5 and 3 kg) of hydrogen from high-pressure storage, resulted in a detonation, from hydrogen a refuelling station.Causes were two untightened bolts securing the…

A hydrogen leak occurred on the a coolant pipe of an electrical generator located in the turbine building, at 200 m from the reactor. Because of the welding works ongoing at that moment on the pipe…

The incident occurred at the hydrogen coolant circuit, when purging the hydrogen with carbon dioxide and air, aiming at finding a leak. Following a preliminary investigation, the power plant company…

An in-tank explosion occurred in a gaseous waste decay tank while the plant was in cold shutdown. The gaseous hydrogen present in the tank formed a flammable mixture and ignited due to air…

A cylinder filled with hydrogen exploded. Hydrogen is used to blow up balloons

The pressure vessel in a chlorine separation system exploded after the corrosion of the steel process equipment allowed chlorine and hydrogen to mix and form a volatile mixture. The chlorine…

Huge explosion of liquid chlorine mixed with hydrogen took place on pulp and paper plant in Arkhangelsk. More than 50 tons of liquid chlorine exploded.

The incident occurred in a catalytic reforming unit. At 13:41, a leak occurred at the 90 elbow of a pressure pipe containing a mixture of hydrogen and naphtha. This pipe was located between the pre-…

During agricultural drainage work carried out by a farmer, an explosion occurred on a hydrogen pipeline located in a field. Flames several meters high were visible and two houses were evacuated. A…

A tank "filled with low-pressure hydrogen" exploded at a food manufacturing plant, killing three workers. The accident occurred when the workers were welding inside the tank after clearing hydrogen…

The 10 m3 hydrogen storage tank at the hydrogen station belonging to the oxygen plant exploded during production operation. The hydrogen storage tank was installed and used by the plant in 1995, with…

The event started at the effluent pipe of one of the hydro-cracking reactors, which broke and released a mixture of hydrogen, light gases (methane, butane), light gasoline; heavy gasoline; gas oil.…

The balloon had a 3.5m external diameter envelope made of anti-tear fabric (same techniques used in full sized balloons of the same company). The inner balloon was a meteorological balloon made of…

This incident occurred at the hydrogen production and storage unit of (probably) a power plant using hydrogen as a coolant of the turbine-generator system. Hydrogen was produced probably by water…

A researcher was conducting an experiment that involved sawdust being heated at pressure using hydrogen gas in an laboratory-scale autoclave.The gas leaked from the autoclave during the experiment…