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HIAD Specific Application Supply Chain Stage: Unintended Hydrogen Production - Chemical Reaction


This incident occurred when subcontractor two workers were widening air vents on the roof of a building hosting a tank containing hydrogen chloride solution. This intervention was necessary to to…
An hydrogen explosion occurred within the off-gas system, causing the stop of the sump pump; subsequently both trains of the standby gas treatment system were declared inoperable. The sump is part of…
A hydrogen explosion caused burns contaminated with radioactive dust to a member of the plant's maintenance crew. Three other workers escaped injury.The accident occurred in the basement of the…
At a soaking facility of an industrial plant in the metallurgy sector, the pipeline between a supply tank and a feed pump became clogged and the autoclave only received sporadic feed. Problems had…
Explosion due to injection of hydrogen into a furnace containing residual air.
A welder was welding a stainless steel drain pipe with an arc welder, above a sulfuric acid storage tank. When he lowered the pipe, the hydrogen gas in tank ignited causing an explosion and one…
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…
Iron powder from non-conducting polypropylene IBC was added to EDTA solution at 60 C in reactor. Hydrogen given off, ignited by static.
Employee used a small industrial vacuum cleaner on an unnamed process. During this process, hydrogen gas built up from a reaction between sulfuric acid and aluminum swarf. When the vacuum cleaner…
The event occurred in an atmospheric pressure tank storing effluents. The plant was in the production phase. The head of the overfill prevention valve located at the top of the tank was thrown a…
The accident occurred during the first phase of the batch synthesis of tricarbonyl compound (methylcyclopentadienyl) manganese (TMCM), while the reaction mixture in the reactor consisted of more than…
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…
An explosion and fire occurred at a 3000-gallon (approx. 11400 l) reactor, part of the production process of linear alkyl benzene (LAB), Process materials released from the various vessels and piping…
Two workers were asked to change the piping and support of a feed line into an intermediate storage vessel for hydrochloric acid. The explosion occurred when they opened the gas line and started…
The explosion involving hydrogen gas knocked a 36-by-70-foot hole in the roof of the plant. Officials said the gas was formed when chemicals mixed in the plant's waste treatment unit.
Employees were trying to open the manhole cover (600 mm diameter) of a hydrofluoric acid tank with a grinder, when an explosion occurred. The explosion was probably caused by the presence of hydrogen…
The explosion occurred during repair work on a boiler. A technician had previously descaled the device using hydrochloric acid, after which he performed the neutralisation step with soda and drained…
At 11:15 pm, an explosion followed by fire occurred in the vicinity of the measurement transformer on an isolated 90,000 V electrical oil transformer at a plant manufacturing technical polymers.…
This entry reports only the role of hydrogen in this nuclear accident. For a short description of the initial causes and the incident evolution, see at field pre-event summary and for a much more…
Explosion in a fine organic chemical plant (Seveso classified )The event occurred during the cleaning of a reactor. At the completion of a batch manufacturing of a soft reducing agent, an operator…
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