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Clean Hydrogen Partnership

Explosion on a electrolyser

Event

Event ID
243
Quality
Description
An explosion occurs in the oxygen gas holder in an electrolysis plant.
The explosion was due to the entry of hydrogen in the oxygen gas holder.
The dome of the gas holder and the collar were blown away.
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?
Gasometer/Gasholder
How was it involved?
Internal Explosion (H2-Air Mixture)
Initiating cause
Malfunctioning (Electrolyser, Cross-Over)
Root causes
Unknown (No additional details provided)

Facility

Application
Hydrogen Production
Sub-application
water electrolysis
Hydrogen supply chain stage
All components affected
Electrolyser, oxygen holder
Location type
Open
Location description
Industrial Area
Operational condition

Emergency & Consequences

Number of injured persons
0
Number of fatalities
0
Post-event summary
The dome of the gas holder (1060 kg) was blown 135m away, the collar (1150 kg) 33m away and concrete elements 80m away.
Emergency action
The video does not show any intevention to stop the fire. The event occurred at night, and probably there was no worker on site when the fire started.

Event Nature

Release type
gas mixture
Involved substances (% vol)
O2, H2
Presumed ignition source
Not reported

References

Reference & weblink

Event description in the French database ARIA<br />
https://www.aria.developpement-durable.gouv.fr/accident/20351/<br />
(accessed October 2020)<br />

JRC assessment