Event
- Event ID
- 285
- Quality
- Description
Leak from faulty hydrogen seal ignited by short circuit between inboard slip ring and outboard slip ring radial lead connection. Hydrogen flame caused damage to brush gear assembly and inboard slip ring.
- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- fire
- Macro-region
- Europe
- Country
- United Kingdom
- Date
- Component involved
- H2 coolant system
- Failure mode
- leak & ignition
- Initiating cause
- material degradation (generic)
- Root CAUSE analysis
The INITIATING CAUSE was a leak of hydrogen via a faulty seal on the turbine rotor.
The ROOT CAUSE is unknown.
- Root causes
- Unknown
- Date entry in HIAD
- 28/02/2009
Facility
- Application
- Power plant
- Sub-application
- unspecified power plant
- Hydrogen supply chain stage
- All components affected
Slip ring, hydrogen seal
- Process temperature range [C]
- Above ambient temperature (50°C to 100°C)
- Location type
- Unknown
- Location
- unknown
- Operational condition
- UNKNOWN
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
- Post-event summary
The damage was confined to the hydrogen sealing systems.
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Release temperature [°C]
- 25
- Probable IGNITION SOURCE
References
- Sources categories
- HSE
- Reference & weblink
Event description provided by HSE, original source confidential
