Quantitative Risk Assessment

We Have Decades of Experience

A QRA is an invaluable method for making informed risk-based process safety planning decisions, as well as being fundamental to any facility siting decision-making. ioMosaic has a proven track record of performing quality QRAs for refineries, chemical plants, LNG facilities, pipelines, and transportation routes. We can help you make risk-based decisions with confidence.

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Our QRA Methodology

  • Identification and development of a representative set of hazard scenarios utilizing commonly accepted methodologies, including failure mode and effects analysis.
  • Evaluation of the likelihood of occurrence of these identified hazardous events, based on a specified number of release sizes (utilizing among other things, the fault tree analysis methodology).
  • Evaluation of the possible consequences from the identified hazardous events utilizing our state-of-the-art hazard modeling software.
  • Evaluation of risk, the combination of frequency, and consequences.
  • Consideration of the significance of the resultant risk levels and, if appropriate, mitigation measures and recommendations to meet relevant risk criteria.

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Featured Resources

Addressing Hazardous Vapor Cloud Dispersions

Combining Exceedance Curves, Structural and Human Vulnerability Criteria

During the development of the QRA, it is critical to properly locate all structures/buildings present in a process facility. Read this white paper for a risk-based approach focused on identifying which occupied buildings in a process facility could be impacted by hazardous dispersions due to toxic and flammable releases.

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Our Team

Georges A. Melhem, Ph.D., FAIChE

President & CEO The founder of ioMosaic and internationally renowned expert in the areas of pressure relief and flare systems design, chemical reaction systems, process safety and risk analysis. Read more...

Neil Prophet

Senior Vice President and Partner He brings over 20 years of experience in pressure relief and flare systems design project management and engineering expertise for chemical, pharmaceutical and petrochemical companies. Read more...

John Barker, Ph.D.

Director The head of our international offices in the U.K. and the Kingdom of Bahrain and an expert in risk management for oil, gas and transportation. Read more...

Neal Dahlheimer, CPPM

Senior Safety and Risk Management Consultant Technical lead on PRFS projects for chemical, petrochemical and oil facilities as well as QA/QC reviews and training on advanced techniques for complex systems. Read more...

James Close, CEng, MIChemE

Senior Consultant Focused on pressure relief and flare system design and analysis for large chemical and petrochemical companies in Europe and the U.S. Read more...

Katherine Anderson, CCPSC

Senior Principal Consultant Experienced project leader in hazard identification, evaluation, functional safety, process safety and risk management. Read more...

Christian Sarno

Senior Safety and Risk Management Consultant Focuses on quantitative risk assessment (QRA), facility siting, pressure relief and flare system (PRFS) design and analysis for chemical and utility companies. Read more...

Hamed M.H. Al Nahawi

Senior Consultant Chemical engineer focused on pressure relief and flare system design and analysis for large chemical and petrochemical companies. Read more...

Peter Stickles, P.E.

Principal Consultant Senior authority with over 50 years of experience in chemical process safety, petroleum refining and petrochemical technology, and process design. Read more...

Anna Shinkawa

Senior Safety and Risk Management Consultant Over 12 years of experience managing and executing PRFS design, risk analysis, and PSM audits for chemical and petrochemical companies in the U.S. Read more...

Ram Goyal

Consultant A seasoned leader in engineering project management and safety standards, specializing in Quantitative Risk Assessment (QRA). Read more...

Adam Baker, P.E.

Senior Consultant He has over 10 years of experience performing quantitative risk assessments, facility siting studies, and providing process safety and relief system design support for clients across the globe. Read more...

Daniel Wilkes, MIChemE

Safety and Risk Management Analyst Experienced in pressure relief and flare system design and analysis for large chemical and petrochemical companies in Europe, the United States and the Middle East. Read more...

Rajeev Kumar

Safety and Risk Management Consultant Seasoned and versatile professional experienced in international oil and gas technical services, operations support and process safety. Read more...

Dianne Coon, CSP

Principal Consultant A CSP Certified Safety Professional with 32 years of experience in process safety and health, and safety and environment (HSE) management. Read more...

Featured Videos

 

Estimating Transportation Risk Using QRA

Consequence and Likelihood

An international client wanted to know the risks of transporting gasoline and diesel by road. Watch this video for a case study presentation by John Barker, Ph.D., on using the Quantitative Risk Assessment (QRA) approach to identify potential problems, their likelihood, possible outcomes, and solutions to reduce transportation risks.

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Featured Case Studies

Quantitative Risk Assessment for a Chemical Facility

A client needed to update a prior QRA study from 2015 of their plant with more equipment and buildings. OSHA 29 CFR 1910.119 PSM requires, under the PHA element, that employers conduct a facility siting study to verify that the location and occupancy of buildings, control rooms and trailers have been properly evaluated. See what elements are included in an ioMosaic QRA report, giving clients a thorough analysis of risk.

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The California Energy Commission was directed to assist in the development of clean alternate transportation fuels. As part of this effort, they support the commercialization of fuel cell vehicles operating on hydrogen fuel. In order to be used extensively in the transportation sector, the safety of hydrogen production, storage, and supply needed to be addressed.

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An oil and gas company retained ioMosaic to complete a stability evaluation of six pressure relief valve (PRVs) that were identified to have inlet pressure drop in excess of 3% of the set pressure to ensure compliance with the PSM standard.
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A large Canadian refinery was performing risk assessments to identify personnel, environmental, and operational hazards in order to satisfy legal and business requirements. This work was being done on a planned schedule, with each unit being reviewed annually. The challenge was to use Process Hazard Analysis (PHA) methodologies that provided an effective analysis appropriate to the particular unit to be studied and the potential hazards.
Read more...

 

Quantitative Risk Assessment Tools

SuperChems®

A powerful calculation and design tool for relief systems, consequence analysis, quantitative risk analysis, facility siting, and more. Read more...

PSMPro™

Identify flaws in the design of facilities and processes that may result in accidents with a suite of time-saving tools for conducting risk analysis. Read more...

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