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HIAD Quality Indicator: 3


Five barrels of aluminum dust that had been removed from an outdoor dust collector were sealed and stored in the plant adjacent to electrical panels. One of them had somehow been contaminated with…
During functional tests of the system, a major quantity of hydrogen-containing gas was released from an adsorber, followed by its ignition.After the alarm was released the feed of the adsorber was…
An explosion occurred in the glass components of a reactor at a pharmaceutical plant during a batch process. At the time of the accident, the reactor was being hydrogenated. As a result of the…
In a graphite purification workshop, the cooling circuit of an electric furnace leaks, the water decomposes in contact with materials heated to a temperature of 1,800C; the gas mixture (hydrogen,…
Explosion in a chemical manufacturing plant for the pharmaceutical and cosmetics industries, classified as Seveso high level, The explosion occurred in the hydrogenation reactor, when opening two…
A hydrogen leak occurred on the a coolant pipe of an electrical generator located in the turbine building, at 200 m from the reactor. Because of the welding works ongoing at that moment on the pipe…
The incident occurred at the hydrogen coolant circuit, when purging the hydrogen with carbon dioxide and air, aiming at finding a leak. Following a preliminary investigation, the power plant company…
An in-tank explosion occurred in a gaseous waste decay tank while the plant was in cold shutdown. The gaseous hydrogen present in the tank formed a flammable mixture and ignited due to air…
The pressure vessel in a chlorine separation system exploded after the corrosion of the steel process equipment allowed chlorine and hydrogen to mix and form a volatile mixture. The chlorine…
The incident occurred in a catalytic reforming unit. At 13:41, a leak occurred at the 90 elbow of a pressure pipe containing a mixture of hydrogen and naphtha. This pipe was located between the pre-…
During agricultural drainage work carried out by a farmer, an explosion occurred on a hydrogen pipeline located in a field. Flames several meters high were visible and two houses were evacuated. A…
The boat was a 6.5 m semi-rigid electric-powered inflatable canoe, mainly used for greeting and directing pleasure boaters in harbour.It exploded without a flame shortly when an employee of the…
The accident happened in an anhydrous ammonia plant, commissioned in March 1977. Hydrogen accumulated inside a Benfield solution (hot potassium) storage tank and was ignited by a static charge, which…
A researcher was conducting an experiment that involved sawdust being heated at pressure using hydrogen gas in an laboratory-scale autoclave.The gas leaked from the autoclave during the experiment…
The incident occurred at a tank of the chlorine electrolyzer of a water treatment plantThe plant products were sodium hypochlorite as a disinfectant for water treatments. The production process used…
The loss of control of a reaction caused a fire in a pharmaceutical plant caused a reaction runaway and the rupture of a 6 m reactor. A cloud containing sodium borohydride and hydrogen was emitted.…
An explosion occurs in the oxygen gas holder in an electrolysis plant. The explosion is due to the entry of hydrogen in the oxygen gas holder.The dome of the gas holder and the collar were blown away.
At approximately 8:45 a.m. an employee was troubleshooting a thermal chamber, evaluating a Hydrogen on Demand (HOD) unit. The chamber was reported inoperative that morning. Two units were being…
A crack occurred in a storage tank (300 kg of hydrogen) releasing gaseous hydrogen to atmosphere. The vapour cloud exploded with an apparent centre of explosion 9 m above ground, with a energy…
There was a massive explosion at one of the generator-turbine units of a coal-based power station. Undetected hydrogen leak from the generator was identified as a major trigger.According to the news…
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