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 Worner 1000 STU gas balloon, of German registry D-OAGH, piloted by a commercial pilot was substantially damaged during landing, when the hydrogen-filled envelope came in contact with a power line, caught fire, and burned. Visual meteorological conditions prevailed at the time of the accident. The balloon was a participant in a racing event associated with the annual Albuquerque Balloon Festival and was being operated under the provisions of 14 CFR Part 91 without a flight plan. The pilot and copilot reported no injuries.

A trained plant operator was blending water, sand, anhydrite, lime, cement, PFA and powdered aluminum in a mixing chamber to produce material for making building blocks. All powders are pre-weighed and dosed automatically via a computer controlled system. The mix is then discharged into a car, from which moulds are filled. During a break in production the operator took the opportunity to wash out the mixer in accordance with his work instructions. He did this by manually emptying out the water hopper into the pre-weigh batcher.

Leak from faulty hydrogen seal ignited by short circuit between inboard slip ring and outboard slip ring radial lead connection. Hydrogen flame caused damage to brush gear assembly and inboard slip ring.

Explosion of hydrogen at slip ring end of an alternator. It was caused by a hose fracture within the generator casing, which led to a discharge of water into the casing and subsequent electrical flashover. Pressure pulse blew out the hydrogen seals and resulted in a fire in the turbine hall.

In a chlorine electrolysis facility, a mixture of oxygen and hydrogen in one of the electrolyzer cells a short-circuit ignited causing a deflagration. The cover of the cell was a thin plastic film which broke as planned. The production was stopped.According to the investigation, the inlet line of the electrolyte in the cell was blocked, which lead to an increase of the temperature in the cell and to the increase of oxygen production. On top of that, the alarm related to temperature control did not function.

Due to the failure of a exhaust system, compressed hydrogen leaked into an area containing electrical components, with consequent fire.Leakage was allowed when exhaust system failed

An isolation failure in starter coil of the high voltage generator induced an electric arc to the hydrogen supply line, with consequent fire and melting of the line.