Event
- Event ID
- 513
- Quality
- Description
Hydrogen in the filter of off-gas system exploded when a welding arc was struck 8’ away. The event occurred during shutdown and maintenance works.
- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- Macro-region
- North America
- Country
- United States
- Date
- Component involved
- off-gas system (pipe)
- Failure mode
- internal explosion
- Initiating cause
- inadequate or no purge
- Root CAUSE analysis
The report does not specify if a purge was required by procedures and was not performed, or if shortcoming in risk assessment was not requiring such a preventing measures, just not foreseeing formation of flammable mixture in the off-gas system
- Root causes
- Date entry in HIAD
- 28/01/2026
Facility
- Application
- Power plant
- Sub-application
- Nuclear power plant - BWR
- Hydrogen supply chain stage
- Location type
- Confined
- Location
- industrial area
- Operational condition
- UNKNOWN
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 2
- Currency
- US$
- Property loss (onsite)
- 0
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Probable IGNITION SOURCE
- Explosion type
References
- Sources categories
- Zalosh
- Reference & weblink
Table II - Industrial Incidents of Appendix A of Zalosh and Short
COMPARATIVE ANALYSIS OF HYDROGEN FIRE AND EXPLOSION INCIDENTS
Quarterly Report No. 2 for Period December 1, 1977 - February 28, 1978
https://www.osti.gov/biblio/6566131
(accessed September 2020)
