Case-study overview
QRA case studies are most useful when they show the facility, scenario, decision and resulting action—not another generic definition of QRA. This library organises Elion’s published project summaries by industry so readers can see how storage, process, loading and emerging-energy hazards change the scope of consequence modelling, frequency analysis and risk reduction.
Use this hub to find the case pattern closest to your facility. Each industry has different hazardous materials, release mechanisms, ignition possibilities, occupancy and regulatory needs. The common thread is traceability: equipment and operating data lead to credible scenarios, scenarios lead to consequence and risk results, and the dominant results lead to practical engineering or management actions.
How to read these project summaries
Commercial confidentiality can limit the process data, frequencies, contour distances and client decisions that can be published. Treat each article as an overview of the facility type and QRA workflow, not as a reusable calculation or proof that another site’s risk is acceptable. A new QRA must use the actual site’s inventory, layout, population, safeguards and operating conditions.
QRA case studies by facility type
| Published summary | Primary study focus | Typical decisions supported |
|---|---|---|
| Jet-fuel storage depot, Bengaluru | Tanks, transfer systems, loading and flammable-release scenarios | Storage safeguards, isolation, fire protection and emergency planning |
| Gas-processing unit, Mumbai | Pressurised gas, process equipment, toxic or flammable releases and escalation | Detection, shutdown, occupied-building exposure and risk reduction |
| Chemical-processing unit, Vadodara | Multiple chemicals, reaction and transfer hazards, fire, explosion and toxicity | Scenario prioritisation, containment, operating controls and response planning |
| Oil refinery, Barauni | Complex process units, inventories, escalation and interacting safeguards | Risk drivers, layout, asset protection and emergency strategy |
| Electric-bus charging hub, Bengaluru | Charging infrastructure, electrical and battery-related incident pathways | Layout, separation, response planning and environmental-risk integration |
Case pattern 1: fuel-storage and transfer facilities
Storage depots often concentrate risk at tanks, pumps, manifolds, loading gantries and transfer lines. The scenario register needs to distinguish smaller leaks from major loss of containment, account for isolation and release duration, and model relevant pool-fire, flash-fire or explosion outcomes. The study should also review drainage, bunding, tanker occupancy, loading practices and emergency access.
The most useful output is not the largest contour alone. Decision-makers need to know which scenario drives risk at an operator location, boundary or adjacent asset—and whether the driver is best reduced by prevention, faster isolation, layout improvement or consequence mitigation.
Case pattern 2: gas-processing and pressurised systems
Gas facilities add pressure-driven release behaviour, rapid dispersion, jet fires and potential escalation. If toxic components are present, concentration endpoints and exposure duration also matter. A QRA should preserve the link between each modelled case and its source equipment, pressure, composition, hole size and shutdown assumption.
Typical decisions include gas-detector placement, emergency shutdown segmentation, blowdown strategy, control-room or occupied-building siting, passive fire protection and emergency response. Where a measure changes release duration or escalation probability, the model should show the basis for any credited benefit.
Case pattern 3: chemical manufacturing
Chemical plants may involve many substances and batch or continuous operating states. A strong scope screens materials and process steps so detailed modelling focuses on credible major-accident scenarios. The study team should reconcile the QRA with HAZOP or HIRA findings, reaction data, storage conditions, utility failure cases and incompatible-material hazards.
Recommendations should be specific enough to close: for example, an engineering change with an equipment tag and drawing reference, rather than “improve safety.” Learn how QRA and HAZOP work together.
Case pattern 4: refineries and complex hydrocarbon sites
Large sites require a structured hierarchy of units, systems, equipment and scenarios. Population modelling, escalation, risk aggregation and sensitivity analysis can materially affect conclusions. The project needs data governance so multiple process areas use consistent assumptions without losing equipment-level traceability.
For layout decisions, combine the current applicable standards with scenario-based analysis. Our OISD-STD-118 layout and QRA checklist explains why compliance review and QRA are complementary.
Case pattern 5: charging and emerging-energy facilities
Emerging systems require careful hazard definition. Do not force every incident into conventional oil-and-gas models. The study should identify applicable electrical, battery, charging, fire and environmental pathways; confirm what can be quantified reliably; and state limitations where failure data or validated models are immature.
Evidence checklist for a credible QRA case study
- Facility context: what was assessed and at what project lifecycle stage?
- Study boundary: which processes, inventories, people and offsite receptors were included?
- Scenario basis: how were release sizes, frequencies, ignition and isolation defined?
- Model basis: which consequence and risk outputs were produced, with what endpoints?
- Decision: which scenario or risk driver changed a layout, safeguard or emergency plan?
- Action closure: what evidence confirms the recommendation was implemented or accepted?
- Limitations: what confidential data, uncertainty or scope constraint affects interpretation?
Questions to ask before relying on another site’s example
- Are the substances, inventories, pressures and operating modes comparable?
- Does the other facility have the same layout, population and surrounding land use?
- Were the model versions, weather cases and risk criteria appropriate for your decision?
- Are the safeguards physically installed and independently verifiable?
- Could a site-specific regulatory or licence requirement change the scope?
If any answer differs, use the case only to frame questions. Do not transfer its numerical result to your facility.
Build a case-specific QRA with Elion
Elion Technologies and Consulting structures studies around verified inputs, transparent modelling, readable outputs and action closure. Depending on the facility, deliverables can include a scenario register, consequence contours, individual and societal risk results, sensitivity review, layout observations and mitigation priorities. See our quantitative risk assessment services and QRA calculation guide.
Which case pattern matches your facility?
Share the process description, hazardous-material inventory, plot plan, occupancy and decision you need the QRA to support. Elion can define a facility-specific basis of study rather than applying a generic template.