Dear Visitor,

The Biennial Report on Hydrogen Safety is now visible under its first version thanks to the great work of the members of the HySafe consortium either as authors or reviewers. The primary idea behind that work was to assemble into one set of documents the fragmented and various knowledge of every HySafe partner so as to cover the entire hydrogen safety field.

It provides a technical insight into the state of the art knowledge on hydrogen safety ranging from basic physical and chemical knowledge (dispersion, combustion) up to practical information related for instance to state of the art risk control measures or emergency response plans.

The various topics dealt with in this document are by order of appearance: Hydrogen fundamentals, Engineering, Hydrogen release and dispersion, Hydrogen ignition, Hydrogen combustion, Effect of hydrogen on materials, Accidental consequences, Risk assessment, Prevention measures, Detection measures, Mitigation measures & Regulation and standards.

It is a living document that you can now access under its first and surely highly perfectible version. Upgrading of the various chapters will take place over time based on new technical results and scientific progress. Please share with us your views and your writing contribution to this encyclopedic type document. 

I hope you will find relevant information to make the hydrogen world a safe world.

Best regards,

The activity leader of the HySafe Biennial Report on Hydrogen Safety
in behalf of all authors



File name / Comment

Introduction / Executive summary

 see above

I. Hydrogen Fundamentals

Version 1.2


II. Hydrogen Technologies

Version 1.2


III. Accidential Phenomena and Consequences

Version 1.2


III.3 Combustion of Hydrogen

Version 1.1

Missing sub-chapter of Chapter III
PDF Document based on Wiki-edition (not yet published)

IV. Risk Assessment

Version 1.2
V. Hydrogen Safety Barriers and Safety Measures  Version 1.2
VI. Legal Requirements, Standards and other Codes
Version 1.2 BRHS_Chap6_V1p2.pdf

VII. Conclusions

Version 1.2