Analysis of Hydrogen Value Chain Events: Implications for Hydrogen Refueling Stations’ Safety

Round 1

Reviewer 1 Report

Line 127. The word of should be from, i.e., Table 3. Type of hydrogen events excluded from the collection process.

Key concepts were well defined. How the research data was obtained was comprehensively described. Data was well analysed and information provided was enhanced by the authors discussion of the results and conclusions made. The information provided in the article flowed well and was interesting to read. The use of hydrogen as a fuel and energy source is increasing rapidly. We have students and staff conducting hydrogen research. The accident causes identified in this paper will be of use for risk management for these people and for many other people who work with or use hydrogen. 

One correction to be made. The rest of the English words used were appropriate.

Author Response

Dear reviewer 1,

Thank you for the positive review and insightful comments.

We appreciate you catching the error at Line 127. You're absolutely right, "of" should be changed to "from." We've corrected this in the manuscript.

As you mentioned, the use of hydrogen is rapidly increasing. We believe the identified accident causes in this paper will be valuable for risk management, not only for your students and staff conducting hydrogen research but also for anyone working with or using hydrogen.

Thank you again for your feedback!

Sincerely,

Authors

Author Response File: Author Response.pdf

Reviewer 2 Report

The article is suitable for publication in the Journal Safety, brings a depth analysis of hydrogen accidents. Statistical analysis shows main causes of accidents of Hydrogen Value Chain.

As reviewer I have no detailed comments, the article is well structured. Only one recommendation: please add to the text short sentence that a new version HIAD 2.1 was released in 2023. Thank you.

I have recommended the article for publication after very quickly minor revision.

Author Response

Dear Reviewer 2,

Thank you very much for your positive review and recommendation for publication! We appreciate your recognition of the article's depth in analysing hydrogen accidents and the valuable insights it provides on the main causes within the Hydrogen Value Chain.

We are grateful for your suggestion to acknowledge the release of HIAD 2.1 in 2023. We've incorporated a sentence mentioning this update in the text (Line 91: The HIAD database was firstly developed within the HySAFE Network of Excellence by the JRC in 2006 [15]. Subsequently, it was updated to HIAD 2.0 in 2017, with the latest version, HIAD 2.1, being released in 2023]).

Thank you again for your insightful feedback and for supporting the publication of our work.

Sincerely,

Authors

Author Response File: Author Response.pdf

Reviewer 3 Report

This paper presents an analysis of hydrogen-related events in refuelling stations. The results have been collected from a well-known and trustworthy database. The results have been clearly presented and useful. This work will help better understand safety in refuelling operations. I recommend the paper be accepted in the current form. 

Author Response

Dear reviewer 3,

Thank you very much for your positive review and recommendation for acceptance. We greatly appreciate your recognition of the paper's focus on analysing hydrogen-related events at refuelling stations, the value of the data source, and the clarity and usefulness of the results.

Hope this work can contribute to a better understanding of safety in refuelling operations.

Sincerely,

Authors

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

No further corrections required.

Reviewer 2 Report

No more comments, I have recommneded for publication.