Event
- Event ID
- 276
- Quality
- Description
A leak of a compression fitting lead to the build up of an explosive air/hydrogen mixture in the generator pit. The ignition of the mixture was caused by corona discharge.
The resultant explosion caused substantial damage to generator and structure.
No injuries to personnel.- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- Macro-region
- Europe
- Country
- United Kingdom
- Date
- Component involved
- H2 coolant system
- Failure mode
- internal leak
- Initiating cause
- unknown
- Root CAUSE analysis
The INITIATING cause was a leaking fitting.
Nothing can be said on the root cause- Root causes
- Date entry in HIAD
- 28/02/2009
Facility
- Application
- Power plant
- Sub-application
- unspecified power plant
- Hydrogen supply chain stage
- All components affected
generator
- Process temperature range [C]
- Above ambient temperature (50°C to 100°C)
- Location type
- Confined
- Location
- unknown
- Operational condition
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 1
- Emergency action
The fire was extinguished by fire brigade (probably belonging to the plant).
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Release temperature [°C]
- 25
- Probable IGNITION SOURCE
- Explosion type
References
- Sources categories
- HSE
- Reference & weblink
Event description provided by HSE, original source confidential
