Event
- Event ID
- 790
- Quality
- Description
- In a petrochemical plant, a gas mixture at 270 bar made of 75% hydrogen (H2) and 25% methane (CH4) leaked through the bottom valve of a dryer of a resin production unit.
After detection of the leak, the explosive zone near the equipment was estimated to be 7 m. Hydrogen sulphide (H2S) was detected around the leak. The installation was shutdown and depressurised, a nitrogen injection used to neutralise the gas mixture.
The emergency plan was called at 13:35, and terminated at 16:40. The pressure in the dryer had dropped to 34 bar. - Event Initiating system
- Classification of the physical effects
- Unignited Hydrogen Release
- Nature of the consequences
- Leak No Ignition (No additional details provided)
- Macro-region
- Europe
- Country
- France
- Date
- Root causes
- Unknown (No additional details provided)
Facility
- Application
- Chemical Industry
- Sub-application
- Resins production
- Hydrogen supply chain stage
- All components affected
- valve, dryer, a resin production unit
- Location type
- Open
- Location description
- Industrial Area
- Operational condition
Emergency & Consequences
- Number of injured persons
- 0
- Number of fatalities
- 0
- Post-event summary
- No ignition.
Event Nature
- Release type
- gas mixture
- Involved substances (% vol)
- H2 75%,
CH4 25% - Presumed ignition source
- No ignition
References
- Reference & weblink
ARIA data base <br />
event no. 43855
JRC assessment
- Sources categories
- ARIA
