Event
- Event ID
- 818
- Quality
- Description
- A tank received, after a negative reactivity test with the bottom supernatant of the tank, 20 m³ of methyl hydro-dichloro-silane, then 24 m³ of a mixture of oil and tar (negative reactivity test) and 10 m³ of a Tar mixture (no reactivity test). Simultaneously, the operator fed an oven by pumping into the tank. A reaction developed 24 hours after these discharges: the filters clog up, the tank overflew, then the reaction stops. The management stated that there was no danger; 15 days later a sudden release of hydrogen occurred with a projection of solid polymer within a radius of 25 m. The tank was found inflated and disengaged from its base, broken anchors.
- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- Macro-region
- Europe
- Country
- France
- Date
- Main component involved?
- Chemical Storage Tank
- How was it involved?
- Internal Explosion (H2-Air Mixture)
- Initiating cause
- Run-Away Reaction
- Root causes
- Root CAUSE analysis
- delayed chemical reaction forming gaseous hydrogen. The factthat the management stated the absence of any rhisk calls for a ROOT CAUSE related to inadequate management of risk.
Facility
- Application
- Chemical Industry
- Sub-application
- Chemical waste storage and disposal
- Hydrogen supply chain stage
- All components affected
- chemicals storage tank
- Location type
- Confined
- Operational condition
Emergency & Consequences
- Number of injured persons
- 0
- Number of fatalities
- 0
- Post-event summary
- Solid polymers were projected within a radius of 25 m. The tank was found inflated and disengaged from its base, its anchors broken.
Event Nature
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Presumed ignition source
- Run-away reaction
References
- Reference & weblink
ARIA data base <br />
https://www.aria.developpement-durable.gouv.fr/accident/6759/<br />
(accessed December 2025)
JRC assessment
- Sources categories
- ARIA
