Professional Risk Analysis Software
Quantitative Risk Analysis (QRA)end-to-end assessment of causes, scenarios and consequences
A unified platform that integrates Fault Tree Analysis (FTA) with advanced dispersion, fire, explosion and vulnerability models for quantitative risk analysis.
- SLAB · LLNL (Ermak, 1990)
- IEC 61025 fault trees
- TNO Yellow Book · CCPS
- Fatal zoneP 1% · 50 m
- Severe zoneP 10% · 100 m
- Moderate zoneP 50% · 150 m
- Safe zoneP 99% · 200 m
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Everything You Need for Risk Analysis
From scenario modeling to regulatory reports, all in one integrated platform.
Fault Trees
MOCUS minimal cut sets, Fussell-Vesely importance and critical path. The resulting frequency feeds the consequence scenario.
5 Scenario Types
Pool Fire, Jet Fire, Fireball, Flash Fire, and VCE with documented formulas and references.
4 Hazard Categories
Thermal radiation, overpressure, toxic dispersion, and domino effect analysis.
Individual and Social Risk
FN curves, risk contours, and population impact assessment.
Interactive Maps
Visualize risk zones on Mapbox with satellite, terrain, and custom overlays.
PDF Reports
Professional branded reports ready to present to regulators.
30+ Parameters
SLAB model with complete configuration for detailed analysis.
From fault tree to F-N curve
Advanced tools based on internationally recognized methodologies.
Fault Tree Analysis
Follows IEC 61025 · MOCUS engine
Build the tree on the canvas, quantify it, and apply the resulting frequency straight to the consequence scenario, traceable back to the source data.
Gates
- AND and OR with dual (q, w) propagation
- k-of-n VOTING by exact convolution
- INHIBIT with enabling condition
- Transfers that split the canvas into sections
Results
- MOCUS minimal cut sets, with order and contribution
- Top event probability, exact or upper bound
- Fussell-Vesely and Birnbaum importance
- Critical path and dominant cut set
- Reliability data
- Your own failure-rate library, importable via CSV, with 14 units (λ, MTBF, FIT, per demand, per length) and five leaf quantification models.
- Calculation record
- Nine-sheet Excel export with live formulas: change a rate and the gates, cut sets and importance recalculate inside the workbook itself.
Thermal Radiation
- 1st, 2nd, and 3rd degree burns
- Fatality calculations
- Equipment damage
- Probit functions
Overpressure
- Eardrum rupture
- Lung damage
- Structural damage
- Window breakage
Toxic Dispersion
- SLAB model integration
- Concentration zones
- IDLH, ERPG levels
- Wind direction analysis
Domino Effect
- Domino effect detection
- Cascading failure propagation
- Time to failure
- Probability assessment
SLAB
Lawrence Livermore National Laboratory · Donald L. Ermak, 1990
The SLAB (Simulating Large Atmospheric Bodies) model is a dense gas dispersion model developed by Lawrence Livermore National Laboratory (Ermak, 1990) and listed among the alternative models in the EPA Guideline on Air Quality Models.
- Evaporating pool
- Horizontal jet
- Vertical jet
- Instantaneous release
- Source types
- 4
- Parameters
- 30+
- Calculation points
- 61
- Stability classes
- 6
Individual Risk
Risk contours by location showing fatality probability for an individual.
See the formulasFN Curves
Cumulative Frequency-Number of fatalities curves for societal risk analysis.
See the formulasP = a + b × ln(D)
where D is the dose/intensity of the hazard
Solutions for Multiple Sectors
Software designed for the specific needs of high-risk industries.
- Petrochemical
- Refineries, processing plants, and storage terminals.
- Oil & Gas - Hydrocarbons
- Upstream, midstream, and downstream operations.
- Chemical
- Chemical production plants and specialties.
- Pharmaceutical
- Laboratories and manufacturing plants.
- Energy
- Power generation and energy storage plants.
- Other High-Risk Industries
- Any industry handling fuels and hazardous substances in their processes.
Practical Applications
Discover how TekRisk can help you with your projects.
Risk Studies
Consequence analysis for environmental permits and authorizations.
Regulatory Risk Studies
Hazard distances and individual and societal risk for the studies required by frameworks such as EPA RMP, OSHA PSM, Seveso III or local regulations.
Emergency Plans
Evacuation zones and emergency response plans.
Due Diligence
Risk assessment for acquisitions and investments.
Plant Design
Safety distances for new projects.
Training
Personnel training on risk scenarios.
Recognized Models and Standards
Every model follows a published reference, with documented formulas and benchmarked cases.
- Formulas published in the docs
- Based on TNO Yellow Book
- Benchmarked against reference cases
Models and their sources
Algorithms taken from the published technical literature.
- SLABLLNL · Ermak 1990
- Dense gas dispersion (LLNL), listed among the EPA alternative models.
- Probit FunctionsTNO Green Book
- Probability functions from the TNO Green Book (CPR 16E).
- Thermal RadiationTNO Yellow Book
- Thermal radiation following the TNO Yellow Book and CCPS models.
Probit Equations
Probability functions for effects on humans and structures.
- Eisenberg
- Thermal radiation - Fatality
- TNO Green Book
- Overpressure - Effects
- HSE UK
- Toxic effects
- Cozzani et al.
- Domino effect
Methodological references
Standards and publications the calculations are based on.
| Organization | Standard/Publication | Code |
|---|---|---|
| IEC | Fault Tree Analysis | IEC 61025 |
| IEC | Event Tree Analysis | IEC 62502 |
| AIChE/CCPS | Guidelines for Chemical Process QRA | CCPS |
| TNO | Yellow Book - Methods for the Calculation of Physical Effects | CPR 14E |
| TNO | Green Book - Methods for the Determination of Possible Damage | CPR 16E |
| LLNL | SLAB Model Documentation | Ermak, 1990 |
Compare Market Options
What each TekRisk plan includes compared with ALOHA and SCRI Fuego.
| Feature | TekRisk Free | TekRisk Pro | ALOHA | SCRI Fuego |
|---|---|---|---|---|
| Price*/ month | $0 | $59.99 | $0 | ~$63.00 |
| Projects | 1 | Unlimited | Not available | Not available |
| Scenarios | 3 | Unlimited | Not available | Not available |
| Chemical Substances | +1300 | +1300 | +1300 | +1300 |
| Fault Tree Analysis (FTA) | 1 tree · 10 nodes | Included | Not included | Not included |
| Event Tree Analysis (ETA) | Included | Included | Not included | Not included |
| Hydrocarbon Mixtures | Included | Included | Not included | Included |
| Fireball / BLEVE | Included | Included | Included | Included |
| Pool Fire | Included | Included | Included | Included |
| Jet Fire | Included | Included | Included | Included |
| VCE | Included | Included | Included | Included |
| Flash Fire (SLAB) | Included | Included | Gauss | Not included |
| Multi-scenarios | Included | Included | Not included | Not included |
| Interactive Map | Included | Included | Not included | Not included |
| Risk Receivers | Not included | Included | Not included | Not included |
| Domino Effects | Not included | Included | Not included | Not included |
| Probit Functions | Not included | Included | Not included | Not included |
| Social Risk (FN Curve) | Not included | Included | Not included | Not included |
| Multi-language | Included | Included | Not included | Not included |
- Included
- Not included
* Prices in US Dollars (USD)
Choose Your Plan
Start free, upgrade when you're ready.
Free
Perfect for evaluation and small projects
$0/month
- 1 project
- 1 source and 3 risk scenarios
- +1300 substances and hydrocarbon mixtures
- Fireball, Pool Fire, Jet Fire, Flash Fire (SLAB) and VCE
- Fault trees and event trees
- Complete technical documentation
Pro
RecommendedComplete analysis for professional teams
$59.99/month
- Everything in Free
- Unlimited projects, sources and scenarios
- Unlimited fault trees
- Duplicate, delete and import scenarios (.tkrm)
- Receivers, probit functions and domino effect
- Individual and social risk (FN curve)
- Risk PDF reports
- Priority support
* Prices in US Dollars (USD)
Check it yourself
The formulas, sources and benchmarks are public: you can review them before relying on a single result.
Yellow Book · Phast · ALOHA
Model validation
Worked cases compared with the Yellow Book, Phast and ALOHA, with the deviation of each one and the differences we have not explained yet.
See validation casesCCPS · TNO · IEC · LLNL
Formulas and bibliography
Every model documented with its equations, symbols, assumptions and bibliographic references.
See the bibliographyChangelog
Public release history
Every published version, with its changes and fixes, in an open log.
See what's new
Got Questions? We've Got Answers
Find answers to the most common questions about TekRisk.
Ready to Transform Your Risk Analysis?
Create your first project for free and compare the results with your own reference.
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