HSL: Layers of Protection Analysis: Practical Application and Pitfalls (LOPA) – Buxton, 14-15 Mar 2017

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HSL is to run a 2 day course on Layers of Protection Analysis: Practical Application and Pitfalls (LOPA).

14th – 15th March 2017


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
    protection/mitigation layers
  • 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, ECI, Process, Electrical and

Course presenter

Dr Colin Chambers CEng MIET has 15 years experience at HSL,
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 HSL/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.


The course will be run at the HSL laboratory 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

Details of hotels in the Buxton area can be found at www.visitpeakdistrict.com.


The cost of this course is £925 per person (includes course
notes, lunch and refreshments).

Book Course



Please note the invoice option is not available within 4
weeks of the course date, or for overseas customers.  If you
are selecting the invoice option for payment, it will be mandatory
to input a purchase order/reference number as we are unable to
process booking forms without this.

For further dates and additional information email: training@hsl.gsi.gov.uk
or contact the Training Conferences Unit
at HSL directly on +44 (0)1298 218806.

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Article source: http://www.hsl.gov.uk/health-and-safety-training-courses/layers-of-protection-analysis-practical-application-and-pitfalls-(lopa)