Release from a Bulk Hydrogen Storage
hydrogen gas released from vent stack following failure of relief valve in pressure relief system on bulk hydrogen installation, no ignition and no injuries.
Event Date
September 26, 1997
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
Hydrogen vent stack, pressure relief valves.
Storage/Process Medium
Location Type
Location description
Unknown
Operational Condition
Currency
Event Nature
Emergency Action
The situation was quickly recognised and steps taken to stop the release.
Emergency Evaluation
System recently installed has a number of pressure relief controls in place.In the incident, a second relief valve opened but did not re-seat correctly, probably because of freezing and an uncontrolled release of hydrogen to the atmosphere occurred.
Release Type
Release Substance
Release Amount (kg)
250.00
Detonation
No
Deflagration
No
High Pressure Explosion
No
High Voltage Explosion
No
Source Category
References
References
Event description provided by HSE, original source confidential