An assembly error of a specific plug in a hydrogen tank in the high-pressure storage unit has been identified as the root cause of an explosion to a hydrogen station in Norway.
Nel ASA has been investigating the incident at the Kjørbo hydrogen station, located just outside of Oslo, with safety consultancy Gexcon and released the latest update today.
The preliminary Gexcon investigation shows that the incident started with a hydrogen leak from a plug in one of the tanks in the high-pressure storage unit.
This leak created a mixture of hydrogen and air that ignited. The investigations will continue into the specific source of ignition.
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