Quantitative Risk Assessment (QRA) Services
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What is Quantitative Risk Assessment (QRA)?
Quantitative Risk Assessment (QRA) is a formal and systematic approach used to identify potential hazardous events, evaluate their likelihood, and assess the consequences in numerical terms.
QRA helps organizations understand the level of risk associated with industrial operations and supports informed decision-making to enhance safety and compliance.
At Indsafe, we provide expert QRA services in India, helping industries evaluate complex risk scenarios and implement effective risk mitigation strategies.
Objectives of QRA Study
- Identify major accident hazards
- Quantify likelihood and consequences of hazardous events
- Evaluate individual and societal risk levels
- Support regulatory compliance and safety planning
- Enable risk-based decision making
Our QRA Methodology
We follow a structured and systematic approach for conducting QRA studies:
Site visit and data collection are carried out to gather all necessary inputs for modelling. This includes plant layout, process conditions, inventory details, PFDs, P&IDs, meteorological data, and surrounding environmental conditions required for accurate risk assessment.
Step 1: Hazard Identification & Scenario Selection
Based on collected data and engineering judgement, potential hazards are identified.
These hazards are typically identified through detailed HAZOP studies.
The study covers:
- Fire and explosion hazards
- Toxic release scenarios
Typical scenarios analyzed include:
- Pool Fire
- Jet Fire
- Vapour Cloud Explosion (VCE)
- Fireball / BLEVE
- Unignited Gas Dispersion
- Toxic Release Hazards
Step 2: Consequence Analysis
For selected scenarios, consequence analysis is carried out using advanced tools such as DNV PHAST.
This includes:
- Determination of release source strength
- Thermal radiation impact distances (pool fire, jet fire, BLEVE)
- Explosion overpressure calculations
- Vapour cloud dispersion modelling
- Toxic dispersion analysis
These results also support Functional Safety and SIL studies.
For indoor facilities, factors such as HVAC air change rates are also considered.
Damage Criteria Considered:
- Thermal Radiation
- Overpressure
- Toxic Exposure
Step 3: Likelihood Estimation
Failure frequencies and release probabilities are calculated using established industry databases and methodologies to estimate the likelihood of each scenario.
Step 4: Risk Evaluation & Recommendations
The major risk contributors are identified based on:
- Damage impact distances
- Frequency of occurrence
Based on the findings, practical recommendations are provided to:
- Reduce risk levels
- Improve safety systems
- Enhance operational reliability
Key Benefits of QRA Study
- Quantitative understanding of risk levels
- Identification of high-risk scenarios
- Improved plant safety and emergency preparedness
- Compliance with regulatory requirements
- Better planning for layout and operations
Industries We Serve
- Oil & Gas
- Chemicals & Petrochemicals
- Pharmaceuticals
- Food & Beverages
- FMCG & Manufacturing
- Automotive
- Power & Energy
- Miscellaneous
Why Choose Indsafe for QRA?
- Strong expertise in risk modelling and analysis
- Use of advanced tools like DNV PHAST
- Industry-specific experience
- Practical and implementable recommendations
- Compliance with international standards
Get in Touch
Connect with our experts for reliable and comprehensive QRA services in India to strengthen your risk management and process safety systems.