Event
- Event ID
- 281
- Quality
- Description
- Explosion of hydrogen at slip ring end of an alternator. It was caused by a hose fracture within the generator casing, which led to a discharge of water into the casing and subsequent electrical flashover. Pressure pulse blew out the hydrogen seals and resulted in a fire in the turbine hall.
- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- Macro-region
- Europe
- Country
- United Kingdom
- Date
- Main component involved?
- H2 Coolant System (Rotating Seal)
- How was it involved?
- Leak & Formation Of A Flammable H2-Air Mixture
- Initiating cause
- Conventional Component Failure (Turbine-Generator)
- Root causes
Facility
- Application
- Power Plant
- Sub-application
- unspecified
- Hydrogen supply chain stage
- All components affected
- generator cooling system.
- Location type
- Confined
- Operational condition
Emergency & Consequences
- Number of injured persons
- 0
- Number of fatalities
- 0
- Emergency action
- Nothing is known on the emergency actions.
Event Nature
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Presumed ignition source
- Short circuit
- Deflagration
- N
- High pressure explosion
- Y
- High voltage explosion
- N
References
- Reference & weblink
Event description provided by HSE, original source confidential
JRC assessment
- Sources categories
- HSE
