HIAD Causes: Management Factors

Hydrogen gas cylinders exploded at the same time in three industrial locations, when the opening valve was opened. The overpressure generated by the explosion caused the walls of the hydrogen…

The last flight of the Space Shuttle Challenger ended 73 seconds after the launch in an explosive burn of hydrogen and oxygen propellants that destroyed the External Tank and exposed the Orbiter to…

At approximately 8:45 a.m. an employee was troubleshooting a thermal chamber, evaluating a Hydrogen on Demand (HOD) unit. The chamber was reported inoperative that morning. Two units were being…

The accident occurred when a welder belong to a sub-contractor company was working on tank roof. The zeolite crystallization tank was being cleaned out with approx. 20% sulfuric acid. It was not…

There was a massive explosion at one of the generator-turbine units of a coal-based power station. Undetected hydrogen leak from the generator was identified as a major trigger.According to the news…

The event started when a gasket in a water pump was blown out. The water pump was situated inside a 100 m long, 10 m wide, and 7 m high building. The pump was feeding water to a vessel containing…

The release and fire occurred during what appeared to be a normal operation in a reactor section of a Residue Hydrotreater Unit, when an eight-inch pipe connected to a heat exchanger failed at the…

A process operator was working in the collaring/ decollaring area of a mechanical workshop. An electric cross cut saw was used to make two diagonal cuts in the collar of a hydrogen cylinder before…

An explosion occurred whole two employees inside a facility were working with aluminum paste. Crews believed the blast was caused by hydrogen that had built up in the plant.

The accident occurred in the Reactor 6 used to carry out the hydrogenation of a pharmaceutical intermediate.The operation of the plant was organized in two shifts. Since the hydrogenation at Reactor…

A catastrophic failure of the low pressure turbine followed by fire and flooding severely damaged the generator. The main turbine automatically tripped due to an erroneous mechanical over speed…

Workers were connecting a compressed hydrogen cylinder, when a release of hydrogen occurred within a safety-box for flammable gases. During the emergency response procedures, the explosive atmosphere…

Piping breakage at atomic power plant- Steam piping (inside diameter: 15 cm; thickness: 1.1 cm) of a heat exchanger for removing residual heat from a reactor was broken during the test of a high…

A tank of liquefied hydrogen felt down in a chemical plant.The tank, containing 100 m of liquid hydrogen, was installed on a concrete plate, which failed. The hydrogen started leaking from the valve…

The event occurred during the disconnection of the hydrogen compressor for maintenance.Two deaths and three injured workers were the consequences. The cause(s) of the event are unknown.

The accident occurred during the maintenance of a sulfuric acid storage tank in an industry for the fertilizers production. The maintenance works consisted in cutting operations (to remove some…

Hydrogen gas leaking from drain pipes in a hydrodesulfurization plant: There was a hydrodesulfurisation plant which had a recycle hydrogen compressor fitted with a suction rectifier. Hydrogen gas…

During repairs of a heat exchanger in a benzene plant, a mixed gas (methane and hydrogen) contained in the cold box attached to the exchanger leaked and caught fire from a welding spark. The…

A fire in a metallurgical plant (classified Seveso)The fire initiated in a acid treatment reactor of a workshop handling cementation of indium . Under normal conditions, the reaction of the process…

Fire due to hydrogen gas leakage from a cadre falling in transportation.