Event
- Event ID
- 547
- Quality
- Description
- A liquid hydrogen tanker had just departed from the home terminal, when the driver notice vapours coming from the curb side of the trailer control cabinet. The driver stopped the vehicle at the closest weight station and discovered that the vapours were coming from the body of the pressure relief valve. A response team from the home terminal discovered that the plug in the body of the relief valve was missing. The relief valve was isolated from the system and the trailer was safely returned to the home terminal, where the missing plug was replaced. The trailer was tested for leaks and released for the next scheduled trip (11 hr).
- Event Initiating system
- Classification of the physical effects
- Unignited Hydrogen Release
- Nature of the consequences
- Leak No Ignition (No additional details provided)
- Macro-region
- North America
- Country
- United States
- Date
- Main component involved?
- Prd (Valve)
- How was it involved?
- Premature Activation
- Root causes
- Root CAUSE analysis
- The INITIAL CAUSE of the leak was a defective valve (the body of the valve was missing).
The ROOT CAUSE seems to be the error in the valve installation/maintenance.
Facility
- Application
- Hydrogen Transport And Distribution
- Sub-application
- LH2 tanker
- Hydrogen supply chain stage
- Hydrogen Transport (No additional details provided)
- All components affected
- PRV
- Location type
- Open
- Operational condition
- Pre-event occurrences
- The LH2 tanker had just departed full from the home terminal
Emergency & Consequences
- Number of injured persons
- 0
- Number of fatalities
- 0
- Environmental damage
- 0
- Currency
- US$
- Property loss (onsite)
- 300
- Property loss (offsite)
- 0
- Post-event summary
- A negligible amount of hydrogen was released.
Event Nature
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Presumed ignition source
- No ignition
References
- Reference & weblink
Incident I-1998020791 of the US Pipeline and Hazardous Materials Safety Administration PHMSA: <br />
https://portal.phmsa.dot.gov/analytics/saw.dll?Portalpages&PortalPath=%… />
(accessed September 2024)
JRC assessment
- Sources categories
- PHMSA
