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COMAH Onshore Major Hazards: New knowledge on flammable hazards

Please email your expression of interest


This course deals with important flammable risks at Major Hazards sites for which new knowledge or guidance has become available recently. It complements the general course 'COMAH onshore major hazards: predictive aspects of COMAH'.

The specific risks dealt with include:

Assessment of vapour cloud accumulation at very low wind speeds (overfill and spray releases). These conditions account for a very high proportion of major incidents involving flammables.

Explosion modelling for large low-lying vapour clouds

Assessment of risks for packaged chemical storage: drum and IBC stores and warehouses.

Delegates will learn how to:

  • Carry out vapour cloud dispersion modelling in very low or nil wind conditions. They will use methods described in FABIG Technical Note 12 and learn how to extend the scope of this guidance to sites with slopes.
  • Carry out explosion analyses for large low-lying cloudsCPD Certified
  • Carry out simple assessments of the potential effects of chemical warehouse fires
  • Advise on controlling the risks from IBC fires.

Who should attend?

Safety professionals and managers who are involved in the co-ordination, writing or updating of COMAH safety reports. Consultants who provide assistance with safety reports.


The course will be run at the HSE Science and Research Centre in the spa town of Buxton. Buxton is in the heart of the Peak District and has good links to mainline train stations and Manchester International Airport.

Details of hotels in the Buxton area can be found at


The cost of this course is £625 per person (includes course notes, certificate of attendance and lunch/refreshments).



Please note that all courses must be paid for via credit card at the time of booking.

For further dates and additional information email: or contact the Training and Events Team at HSE directly on +44 (0)203 028 3704.

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