Event
- Event ID
- 366
- Quality
- Description
While pressurizing a liquid hydrogen tanker for the transfer, a burst disc ruptured. The tanker pressure was 22 psig (ca. 1.5 bar). The relief valve was set at 27 to 29 psig (1.9 to 2 bar). The tanker was moved to remote location and the disc replaced under loaded conditions. The transfer was resumed. However, during the operation, there was a leak through the vent valve.
- 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
- PRD (valve)
- Failure mode
- failure to activate
- Initiating cause
- unknown
- Root CAUSE analysis
INITIATING CAUSE was due to the relief valve which did not operate. Because of this, the pressure increased sufficiently to cause the burst disc to fail. Leakage through the vent valve was attributed to water entering the system during repair to replace the burst disc.
- Root causes
- Date entry in HIAD
- 16/11/2024
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- LH2 tanker
- Hydrogen supply chain stage
- All components affected
burst disc
- Process temperature range [C]
- cryogenic temperature (below -50°C)
- Process pressure range [MPa]
- low to medium pressure (below 2 MPa)
- Location type
- Open
- Location
- industrial area
- Operational condition
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Release pressure [MPa]
- 0.2
- Probable IGNITION SOURCE
References
- Sources categories
- ORDIN
- Reference & weblink
Mishap no 14 in
P. L. Ordin, Review of hydrogen accidents and incidents in NASA operations, 1974, NASA TM X-71565
https://ntrs.nasa.gov/citations/19740020344
