Our experts perform Quantitative Risk Analysis (QRA) and Focused Quantitative Risk Analysis (fQRA) for process safety managers, project risk leads, and operators of high-consequence and Seveso-regulated facilities — the scenarios that are too complex or too consequential for HAZOP and LOPA alone. We quantify both sides of the risk equation, combining fault tree and event tree analysis, human reliability assessment, and consequence modeling (dispersion, fire, and explosion) to express individual and societal risk and demonstrate it against your tolerability criteria, following the CCPS Guidelines for Chemical Process Quantitative Risk Analysis.
Quantitative Risk Analysis (QRA) & (fQRA)
We use this rigorous methodology to evaluate the consequence and likelihood of engineering and technical scenarios. Consequence is typically expressed as fatalities or failures, and likelihood as a frequency (events per year); together they give individual risk, societal risk (F-N), and a defensible comparison against your risk tolerance criteria. Fault tree analysis quantifies how combinations of failures lead to an event, and event tree analysis develops the outcomes that follow. When only part of a full QRA is needed, our Focused QRA (fQRA) targets the specific scenarios that drive the tolerability decision and the recommendations to get there.
Human Reliability Assessment
Human Reliability Assessment — Many high-consequence scenarios depend on an operator acting correctly under pressure. Human reliability assessment quantifies the probability of human error in those scenarios and feeds it into the fault and event trees, so a QRA that relies on human action carries a defensible, not optimistic, number.
Facility Siting
Facility Siting assesses hazards and the potential damage that an explosion, fire, or toxic chemical incident could cause both onsite and offsite.
The engineering service is performed in accordance with American Petroleum Institute (API) Recommended Practice 752 Management of Hazards Associated with Location of Process Plant Permanent Buildings. This will conform to requirements in OSHA Process Safety Management (PSM) Standard 29 CFR 1910.119 for evaluation of “facility siting” in process hazards analysis.
Gaussian Modeling
Gaussian Modeling is useful in determining how a gas will disperse as it leaves a leak outside, in an unobstructed space. Once the leak hits another object, then the dispersion characteristics change, and consideration will be made based on the scenario to use CFD. By modeling a typical leak and then using the model many times at key points in a process, like 360 degrees around a flange, provides a much better analysis for determining what will happen and then the probability of detecting it with a gas detector.
Continuing Engineering Support
Functional Safety Management Program maintenance is challenging. Our Continuing Engineering Support team provides a consulting engineer to assist your team as required. Our team of chemical engineers and functional safety experts are available for short or extended periods to function as part of an engineering team for something as simple as verifying SIL calculations or as complex as audits.
For General Inquiries and Software or Training Quotes please contact us by email at [email protected] or call +1-614-451-7031 or use the form below:
Contact - Kenexis
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