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This data is from the European Hydrogen Incidents and Accidents database HIAD 2.1, European Commission, Joint Research Centre.

Fire on the Cooling System of an Alternator
The incident occurred in the turbine-generator hall of a nuclear power plant. Hydrogen leaked from the alternator and ignited.The hydrogen line was purged to stop the leak. The plant employees were able to stop the fire in one hour. An assessment of the concentration of hydrogen in the hall did not reveal the presence of an explosive mixture.
Event Date
June 9, 2003
Record Quality Indicator
Region / Country
Event Initiating System
Classification of the Physical Effects
Nature of the Consequences
Causes
Facility Information
Application Type
Application
Specific Application Supply Chain Stage
Components Involved
alternator, turbine-generator hall
Storage/Process Medium
Location Type
Location description
Industrial Area
Operational Condition
Currency
Event Nature
Emergency Action
The event occurred in the non-nuclear zone of he power plant. The corresponding part of the hydrogen pipe was isolated and purged and the fire extinguished after consumption of all the remaining hydrogen within one hour.
Release Type
Release Substance
Hydrogen Release Concentration (%)
100.00
Detonation
No
Deflagration
No
High Pressure Explosion
No
High Voltage Explosion
No
Source Category
References
References

Event description in the French database ARIA
https://www.aria.developpement-durable.gouv.fr/accident/24741/
(accessed January 2023)

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