A chemical mobile intervention unit intervened in the faculty to neutralize in an envelope sealed an experimental device likely to release hydrogen. The faculty was evacuated during the intervention.

In a fertiliser plant, an ammonia synthesis unit stopped following the malfunction of an alternator (due to a thunderstorm). The safety features were operating normally, yet the synthesis gas (N2 / H2) emitted into the atmosphere ignited in the chimney (sparked by lightning?). Alerted by the noise and after noticing the flames raging for 15 min, neighbours contacted the fire department. During this time, the facility operator cut the natural gas intake that supplied the unit and secured the installation. Fire-fighter presence was not required at the site.

In a chemical plant, a violent explosion took place during the batch production of chlobenzorex from an aqueous solution of sodium borohydride contained in a feed tank on a movable truck. The workshop was devastated: roof ripped out, light walls displaced, solvent pipes ruptured by the projections. The feed tank was destroyed but the remaining process equipment was not damaged.Outside the workshop but near a door, a technician was projected against the containers by the shock wave.

A fire occurred on a valve of a hydrodesulfurisation unit in a refinery. A cable gland was modified. Steaming wreaths are permanently installed.

Fires and chain reactions involved more than 100 cylinders of hydrogen or other gases in a storage system. The fire lasted for more than 5 hours and the neighbourhood has been affected by flying ignited debris projected by the explosion.

A fire occurred on a flange of a hydrodesulfurisation unit during start-up operations. A failure of this flange caused of the leak.

In a chemical plant, a fire broke out on a hydrogen column of an ammonia manufacturing unit. The internal security service extinguishes the fire with powder and nitrogen injection. The unit was cooled with water.

In a petrochemical plant, a fire occurred on the methanation unit (95% H2 + 5% CO -> CH4 + H2 + H2O) of a steam cracker. A seal break on a flange of the circuit caused of the accident. No casualties were reported. The internal operational plan was started.

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 levels emitted by jets of H2 gas. The flow was increased up to 55 kg / s. After 23 s, while decreasing the flow, the hydrogen ignited. A fireball was formed followed immediately by an explosion. The Vapour Cloud explosion VCE (mainly negative overpressure) caused damage to structures of the surrounding buildings (walls, doors, roofs).

Hydrogen leakage occurred on a pipe flange in an ammonia synthesis unit. A fire started immediately, which was taken under a control before the arrival of firefighters.