Layers of Protection Analysis: Practical Application and Pitfalls (LOPA)
08 July 2021 - 16 July 2021
The course will take place over 4 days on the 8th, 9th,
15th and 16th July 2021.
Other available dates: email us to
Layers Of Protection Analysis (LOPA) is a risk assessment method
used to determine and hence demonstrate the ability of existing and
proposed safeguards to protect against identified hazard scenarios
and to meet predetermined risk based criteria.
The Process Safety Leadership Group (PSLG) prepared specific
guidance for the applications of LOPA to determine the required
safety integrity level (SIL) for overfill protection of highly
flammable fuel storage tanks at sites similar to Buncefield. The
course presenter was a member of the PSLG LOPA working group that
developed the LOPA guidance. This course will draw on that
guidance, its relevance to LOPA assessment in general, and pitfalls
identified during the assessment of a large number of LOPA studies
from the petrochemical industry.
The course will cover:
- LOPA, uses and complexity
- When to use LOPA and when to consider QRA
- LOPA study prerequisites and preparation?
- LOPA target frequencies
- Human Factors
- Input data sources and uncertainty
- How to perform LOPA; LOPA rules and IEC 61511 requirements,
scenario's, conditional modifiers, enabling events, Independent
- LOPA Outcomes; regulator expectations, ALARP
- Example pitfalls associated with LOPA
Case study examples
Who should attend
The course is aimed at those engineers, managers and safety
professionals who have a basic knowledge of risk assessment
possibly gained through HAZOP studies and PHA studies, who would
like to have an understanding of the LOPA method and how to apply
LOPA and the pitfalls commonly associated with this type of
For example typical attendees could be:
- SHE managers
- Engineering Managers
- Operations personnel
- Engineers - Safety, EC&I, Process, Electrical and
Dr Colin Chambers CEng MIET has 15 years experience at HSE,
initially on the development of risk assessment methods for the
assessment of safety related systems such as the SIL determination
method in informative annex of BS EN 62061 and 11 years experience
of risk assessment within HSE and as a COMAH technical assessor. Dr
Chambers was a member of the PSLG working group that developed the
PSLG LOPA guidance and was part of the CA team charged with
assessing post Buncefield LOPA studies
Dr Chambers has written peer reviewed papers and HSE reports on
issues associated with LOPA and given numerous presentations at
venues in the UK and in Europe.
Live Online Course Information
All you'll need is an internet-connected computer, laptop or
tablet plus webcam and microphone. We do not recommend using a
smartphone. Before you book, you can check that you meet the
Zoom System Requirements and run a diagnostic test to ensure the
software is compatible with your firewall settings - if it doesn't
work, try adjusting your settings or contact your IT department
about permitting the website.
Printed course material will be delivered direct to your door
and even include a little treat for you to enjoy on your coffee
If you would like training delivered specifically for your
organisation we can use other platforms such as MSTeams, so please
get in touch to discuss your requirements.
The cost of this course is £1,195 per person (includes
course notes and certificate of attendance).
Please note that all courses must be paid for via credit
card at the time of booking.
For further dates and additional information email: email@example.com or
contact the Training and Events Team at HSE directly on +44 (0)203
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