Training courses and seminars

Quantitative Risk Assessment

4 day duration: 12-14 May

Quantitative Risk Assessment (QRA) is a structured technique to identifying and quantify the risks associated with hazardous process establishments which could potentially endanger operators, the public, the environment and the asset, and it represents an essential element for the development of a Safety Report as required by Seveso Directive.

The 4 days training course is focused on providing the principles of the risk quantification, with detailed instructions on tools and methodologies dedicated to major accidents identification and their relevant frequency and consequences assessment.


Participants will develop the knowledge and skills, through the use of interactive case studies, necessary to understand and to contribute to the development of a risk assessment study within a Safety Report. The workshop will provide case studies aimed at improving the familiarity with the techniques and methodologies to be applied.

Who should attend?

  • Plant and Maintenance Managers, Key HSE Functions, Key Supervisors, Project Managers and Project/Process Engineers responsible/involved in facilities’ HES management.


Risk assessment training course shall include:

  1. Introduction to Risk Management and Assessment.
  2. Brief presentation of Seveso Directive with main principles and objectives.
  3. Basic principles of dangerous substances classification.
  4. Historical analysis; techniques and tools for the identification of the major accidents. Examples of detailed report and lesson learning process.
  5. Introduction to HAZOP methodology and to the use of the results in the identification of the major accidents.
  6. Basic description of reliability with focus of the identification of failure rates and unavailability of complex systems.
  7. Fault Tree Analysis fundamental principles and its application on the major accident frequency calculation (with worked examples and analysis of the effects off mitigating measures).
  8. Approach to random failure (basic data base, use of corrective factors, API RP 581 approach).
  9. Source terms definition and analysis of major accidents dynamics (time for intervention, detection network, isolation systems, etc.).
  10. Analysis of evolution of possible alternative scenarios by means of Event Tree technique (probability of ignition, frequency of alternative scenarios like jet fire, pool fire, UVCE, BLEVE).
  11. Major accidents consequences assessment (basics of thermodynamics and chemistry behind the phenomena associated to a loss of containment, simplified formulas for estimate of the damage distances, use of dedicated software tools for consequences assessment).
  12. Structured approach to domino effects evaluation (main governing elements, calculation of Domino Effects frequency, estimate of risk reduction due to mitigating measures, role of active and passive fire-fighting measures).
  13. Risk presentation and elements for decision makers (risk acceptability criteria and risk ranking, elements for land use planning and external emergency planning).
  14. Case study: Risk Analysis Exercise, including:
  • Analysis of a chemical site;
  • Dangerous substances inventory;
  • Identification of major accidents;
  • Major accidents frequency estimate;
  • Major accidents consequences evaluation;
  • Evaluation of acceptability of the risk.
    The exercise can be customized on specific field of application (Oil & Gas Upstream, Oil & Gas Downstream, Petrochemical industry etc.).

Training sessions will be basically held in English language, with translation of material and speeches in Turkish language.