The event occurred in a university research building dedicated to the study of the take-off of space launchers . An operator gave the alarm during the hydrogen pressure pre-setting phase. he had seen on the video surveillance screen a flame at a pressure regulator on the line located on the walkway above the test hall.

A hydrogen and fuel cells bus experienced a hydrogen detection alarm in a city centre. This triggered the evacuation of the immediate surroundings and the towing of the vehicle to the maintenance garage.

This near miss occurred at a CHP plant operation with a SOFC. During the heating phase, the SOFC stopped due to the opening of the mainpower switch.This was due to a contact problem inside the SOFC module, but the reason was not clear at first.

A vehicle overlooked into a road, overlooking the presence of another vehicles. The latter tried to avoid the accident by crossing to the other lane, occupied by a FCEV. The car was hit in the front.

The FCEV driver did hit a pole with the left front at a relative low speed.

A truck conventional truck moved to another lane and did not see the FCEV. The collision caused a total loss to the latter.

A conventional truck drove into a FCEV. The left rear side was damaged. There were no injuries and no hydrogen released. The car body needed to be repaired and the receptacle and the hydrogen tube need to be replaced.

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).

An explosion occurred at testing equipment of a fuel-feeding system for a space rocket engine. According to the original source of this event, now lost, the test envisaged a 42 MPa high-pressure hydrogen gas flow system, an exhaust gas duct outlet was damaged and hydrogen blew out and exploded. High-pressure hydrogen was flowing during the test, and burned not in the burner (a gas generator), but in a silencer tower after flowing through an exhaust gas duct.

A leak of hydrogen gas, followed by an explosion, occurred when an engine was loaded with air, oxygen, and hydrogen, and then started for a preliminary ramjet engine combustion test. The engine was ignited with a fuse head. The test facilities were destroyed,