Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… failed, probably due to material failure, and the plant was automatically put in hot stand-by (feed and energy supply automatically cut out). The plant was gradually cooled down. After about half an hour, for … the environment.The whole amount of flammable substances (hydrogen, methane, toluene and benzene) involved in the …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… gas compressor inter-stage relief valve, failed releasing hydrogen-rich synthesis gas into the methanol area. The pipe failed at the pipe-flange junction. Syngas was ignited by an unknown ignition source and the resultant … to the explosion. It is not known whether the pipe failure was due to fatigue or to a sudden overload. According to …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… The vessel affected by the incident was a gas storage used for the desulfurisation process. The desulfurization gas had high hydrogen content. The vessels had cracks in the upper … a gas release. Approximately 2.5 hours after that a leak was detected and reported, a first explosion occurred. As the …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… building, causing a fire in adjacent switches. This was followed by the tripping out of the three refinery … air supplies for some 30 minutes.The cause of the incident was a fault in a 15 kiva circuit breaker voltage transformer … bar fault During the power loss and shutdown of plant, a hydrogen leak developed on a valve, and a tube of a fin-fan …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… with CO2 extinguishers, the internal emergency plan was activated, and the firefighters ventilated the premises … unplanned stop of the process caused the generation of hydrogen production a very slow rate: a change from 0 to 8% LEL in 3 hours was detected.For more than an hour, the staff, assisted by a …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… nickel and chromium stopped. One of the two furnaces was at the end of the smelting cycle. The temperature of the metal was 1300C. Due to the stop of the cooling system, water from … water contained in the coil, which could have generated hydrogen, its ignition followed by an explosion. Therefore, …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… abundant black smoke, occurred at 8:50. An ignited leak of hydrogen (H2) in the ammonia production unit (NH3) had spread … machines in the workshop while a lower secondary explosion was noticeable. The operator closed the water networks of the … did not reveal any dangerous concentration; 200 ppm was measured in the machine room of the accident unit (the …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… to nearby residential property. Damage to the facility was estimated at $101 million and major transportation routes … OSHA determined that the immediate cause of the accident was the internal structural failure and drive shaft blow-out … to the report, the check valve's failure was due to hydrogen embrittlement and resulted in a large flammable gas …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… The nuclear plant was a boiling-water reactor with an output of 0.54 million kW. The component affected was a steam piping (inside diameter: 15 cm; thickness: 1.1 … inside and completely broken. From the broken surface, a hydrogen gas remaining in the piping apparently got ignited …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… The boat was a 6.5 m semi-rigid electric-powered inflatable canoe, … after unplugging the batteries. The back of the boat was projected into the air, together with the employee, which … the canoe. Apparently, the reason of the explosion was the hydrogen emitted from the dry batteries of the vessel, which …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… for inspection. The flange on the heat exchanger side was not easily accessible. On reassembly, the presence of a … of high-octane gasoline, mixed with hydrocarbon gases and hydrogen. Without a hot spot nearby, this 500C fluid could …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… a heat exchanger for removing residual heat from a reactor was broken during the test of a high pressure core injection … gases. The part of the piping that was located on the 2nd floor of the building as broken but … inside and completely broken. From the broken surface, a hydrogen gas tapped remaining in the piping apparently got …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… put out the fire using a powder extinguisher. The response was concluded at 2:30 am, with plant production resuming by … issued a press release. The cause of this accident was a hydrogen release and explosion, most likely triggered …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… An isomerization unit of a refinery was affected. The release was caused by the mechanical failure of one of the two … of the release and ignition of a gas mixture containing hydrogen. The jet fire headed towards the adjacent benzene …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… week shutdown of much of the refinery. Fortunately no one was injured and equipment damage was negligible.When the hydrocracker make-up compressor … the control system at the reformer released the excess hydrogen to the flare. However, no increase flame was …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… (hired 6 months back), recently assigned to this post, was left without supervision to manage a process modified … time. In the process, the order of addition of reactants was not specified. The technician loaded first 800 kg of oil … explosion of the tank followed, caused by the formation of hydrogen (and perhaps also sodium hydride, NaH) from the …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… dump valves on the supply lines. The released gas (cloud) was ignited apparently by the hot carbon particles obtained … 60 kg). The decomposition products are normally carbon, hydrogen and methane, but no data are available about their … no data are available about their cost. The released gas was ignited because the automatic water quenching system …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… plant, during his inspection round, an operator detected a hydrogen leak at a flange of an exchanger located between the … 2 vapour rings were placed around the flange. A marker was also placed around the flange to indicate that access to the area was prohibited. Several control points are defined. Three …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… and the fire service attended as a precaution. The gas was both flammable and toxic, containing 21% carbon monoxide and 5% hydrogen.The onsite emergency plan was activated and the workers sheltered in toxic gas refuges. …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… (methane, butane), light and heavy gasoline, gas oil and hydrogen was released from the pipe and instantly ignited upon contact … with air, causing an explosion and fire. An operator who was checking a field temperature panel at the base of the …
