Event
- Event ID
- 297
- Quality
- Description
- A vehicle (non-further specified) carrying two hydrogen gas cylinders had to brake suddenly. The two cylinders tipped over, damaging the valve and causing hydrogen gas to leak out and ignite.
The vehicle was completely burned, no one was injured. The cylinders had fallen over because not secured. - Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- Fire (No additional details provided)
- Macro-region
- Asia
- Country
- Japan
- Date
- Main component involved?
- Valve (Generic)
- How was it involved?
- Rupture & Formation Of A Flammable H2-Air Mixture
- Initiating cause
- Impact, Rollover, Crash
- Root causes
- Root CAUSE analysis
- The INITIATING was a road event (sudden braking)
The ROOT CAUSE was not having secured the cylinders to the vehicle structure, to avoid they could fly around.
Facility
- Application
- Hydrogen Transport And Distribution
- Sub-application
- CGH2 cylinders truck
- Hydrogen supply chain stage
- Hydrogen Transport (No additional details provided)
- All components affected
- cylinder valves
- Location type
- Open
- Operational condition
Emergency & Consequences
- Number of injured persons
- 0
- Number of fatalities
- 0
- Emergency action
- The emergency stop was activated, and the facility was shut down for safety. This prevented the bottom valve from being reopened and triggered the automatic sprinkler system in the unloading area. This was supplemented by a fire truck from the internal emergency services. The emergency plan was activated, and the 127 employees on site were evacuated. A 900 m safety perimeter was established, and the road was closed.
Once the operations were completed, the emergency plan was deactivated approximately 7 hours later.
Event Nature
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Presumed ignition source
- Not reported
References
- Reference & weblink
High Pressure Gas Accident Cases Database of the KHK (High Pressure Gas Safety Association): <br />
https://www.khk.or.jp/public_information/incident_investigation/hpg_inc… />
(accessed May 2025)
JRC assessment
- Sources categories
- KHK
