HIAD Event Initiating System: Hydrogen System Initiating Event

[NOTE: the sources are not completely clear in describing the system involved in this incident ; the following is the most plausible option according to HIAD validator]The explosion happened in two…

A shift supervisor received severe burns and later died after a flexible hose used to transfer hydrogen to the catalytic reformer was over-pressurised and caught fire.Hydrogen is supplied from three…

Hydrogen explosion at a chlorine chemical production plant (Seveso-classified) The plant had been shut down for two weeks, and maintenance works were ongoing. Two subcontractor employees were…

The accident occurred at a distillate dewaxing Unit (MDDW) of the refinery, during the operation of regeneration of the catalyst. To perform this operation, both temperature and pressure have to be…

The event occurred in a support building at a test stand complex. The explosion destroyed two support buildings and severely damaged a large amount of equipment. No one was injured.Gaseous hydrogen…

A hydrogen leak followed by an explosion occurred at an elbow of a pipeline cooling system and the separator of the distillation unit. The explosion destroyed the unit and injured two workers.

Hydrogen explosion on NPO "Azot" in Rovno, Ukraine.

The hydrogen buffer tanks that exploded were part of an experimental facility experimenting generation of renewable hydrogen from a water electrolyzer coupled to solar panels.The three hydrogen tanks…

Explosion at Shreveport refinery involving hydrogen injured a worker

An open backed truck was delivering various industrial gases to sites. At the site of the explosion a rack of argon gas bottles was being delivered to a laboratory in the building adjacent to the…

Release from pressure bottle followed by ignition and perhaps fast deflagration. Nine people affected, including the operator of the bottle.

The event occurred at manhole cover of a of a pilot plant reactor where hydrogenation had been performed in a hydrochloric aqueous solution. The reactor had been flushed three times with nitrogen (i.…

The explosion occurred when an operator opened a valve on the hydrogen network of the plant. The operator suffered from a burn in the forearm and two other employees are shocked by the pressure wave…

The accident occurred in a testing site for space equipment. The high pressure combustion took place in a liquid hydrogen tank (H2) under a high pressure and in presence of 12 m (700 kg) of liquid H2…

In a laboratory, tests with hydrogen as aerospace rocket propellants were carried out. One of the experiments consisted in the generation of a vertical jet (turbulent regime) to determine the sound…

The explosion occurred while maintenance personnel were grinding a high-pressure injection (HPI) pipe, which had been recently cut at approximately 18 inches from the nozzle connecting the HPI pipe…

The incident took place in compression room of methanol synthesis manufactory of ZAO Azot in Severodonetsk. As a result of pipeline destruction mixture of pressurized gases (mostly hydrogen) filled…

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…

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,…