Event
- Event ID
- 1125
- Quality
- Description
An empty LH2 trailer was returning to the basis, when the driver noticed a significant pressure increase. The driver stopped the truck in a non-heavily populated area and performed a venting to reduce the pressure. The pressure value went down to 9 psi (0.6 bar) and stabilised at 14 psi (0.9 bar).
After which, the trailer could return to basis without further incident.- Event Initiating system
- Classification of the physical effects
- Unignited Hydrogen Release
- Nature of the consequences
- leak no ignition
- Macro-region
- North America
- Country
- United States
- Date
- Component involved
- LH2 tank (road tanker)
- Failure mode
- rupture, no ignition
- Initiating cause
- over-pressurisation (wrong operation)
- Root CAUSE analysis
The INITIAL CAUSE was over-pressurisation of the LH2 tank, which triggered the need of a venting.
- Root causes
- Unknown
- Date entry in HIAD
- 09/09/2024
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- LH2 tanker
- Hydrogen supply chain stage
- All components affected
Tank Shell
- Process temperature range [C]
- cryogenic temperature (below -50°C)
- Process pressure range [MPa]
- low to medium pressure (below 2 MPa)
- Location type
- Open
- Location
- highway or similar
- Operational condition
- Pre-event occurrences
The nominal capacity of the trailer was 1300 gallons (3500 kg of LH2)
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
- Currency
- US$
- Property loss (onsite)
- 0
- Post-event summary
Approximately 135 kg of LH2 were lost.
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Released amount (kg)
- 136.22937168812
- Probable IGNITION SOURCE
References
- Sources categories
- PHMSA
- Reference & weblink
Incident E-2012070336 of the US Pipeline and Hazardous Materials Safety Administration PHMSA:
https://portal.phmsa.dot.gov/analytics/saw.dll?Portalpages&PortalPath=%…
(accessed September 2024)
