HIAD events | Clean Hydrogen Knowledge Hub

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02/03/2025
France

Explosion in a workshop handling sodium residues

Event ID: 1219
Quality: 3
Application: Chemical industry
Component involved: reactor / oven / furnace / test chamber
Hydrogen supply chain stage: Unintended hydrogen production - chemical reaction
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 30/09/2025

17/09/2025
Germany

Collision with a fuel cell and hydrogen train

Event ID: 1218
Quality: 3
Application: Non-road vehicles
Component involved: FCEV train
Hydrogen supply chain stage: Hydrogen as fuel
Nature of the consequences: n.a.
Classification of the physical effects: No Hydrogen Release
Date entry in HIAD: 30/09/2025

04/11/2024
Finland

Ammonia-hydrogen explosion in a pulp production plant

Event ID: 1217
Quality: 5
Application: Chemical industry
Component involved: chemical storage tank
Hydrogen supply chain stage: Unintended hydrogen production - chemical reaction
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 30/09/2025

01/01/2016
Australia

Hydrogen-fired boiler explosion

Event ID: 1216
Quality: 4
Application: Chemical industry
Component involved: hydrogen-fired boiler
Hydrogen supply chain stage: Hydrogen as fuel
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 30/09/2025

12/03/2025
Germany

Leak from a CGH2 tube trailer

Event ID: 1215
Quality: 3
Application: Hydrogen transport and distribution
Component involved: piping (generic)
Hydrogen supply chain stage: hydrogen transport
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 30/09/2025

12/03/2024
France

Leak from a tube trailer during filling

Event ID: 1214
Quality: 3
Application: Hydrogen transport and distribution
Component involved: valve (generic)
Hydrogen supply chain stage: Hydrogen transfer
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 30/09/2025

08/08/2024
France

Leak from a tube trailer during filling

Event ID: 1213
Quality: 3
Application: Hydrogen transport and distribution
Component involved: valve (generic)
Hydrogen supply chain stage: Hydrogen transfer
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 30/09/2025

20/06/2023
Japan

Explosion at a high-pressure furnace

Event ID: 1212
Quality: 4
Application: Chemical industry
Component involved: reactor / oven / furnace / test chamber
Hydrogen supply chain stage: Hydrogen as feedstock
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 30/03/2026

30/11/2017
Japan

Explosion in a hydrogen gas holder

Event ID: 1211
Quality: 4
Application: hydrogen production plant
Component involved: CGH2 tank (stationary)
Hydrogen supply chain stage: hydrogen stationary storage
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 30/09/2025

22/07/2024
France

Diesel-hydrogen fire in a refinery

Event ID: 1210
Quality: 2
Application: Petrochemical industry
Component involved: pipe (generic)
Hydrogen supply chain stage: Hydrogen as process gas
Nature of the consequences: fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 30/09/2025