Enhanced Consequence Modeling with Target Releases
Target Releases - Bridging Impact Analysis to Environmental Consequence Modeling
We are excited to announce a significant enhancement to DORAS: the Target Releases feature. This feature addition bridges the gap between dropped object impact frequency calculations and physical consequence calculations, enabling offshore operators to visualize and quantify the potential extent of fluid releases from damaged subsea infrastructure. Whether you are assessing risks to pipelines, umbilicals, or subsea equipment, the Target Releases feature provides a comprehensive framework for understanding not just if damage might occur, but what the resulting consequence footprint could look like.
What Does This Feature Do?
The Target Releases feature allows you to link specific leak scenarios to your subsea targets, then calculate and visualize the resulting surface pool hazard zones. The system models the entire journey from a dropped object impact through to the surface manifestation of a fluid release.
Key capabilities include:
- Assigning multiple leak scenarios to any target in your study
- Automatic calculation of surface pool sizes using industry-standard models
- Visual representation of hazard zones on the interactive map
- Release frequency calculations following DNV-RP-F107 methodology
- Comprehensive reporting and chart analysis options
How to Use Target Releases
Getting started with the Target Releases feature is straightforward:
- Define your leak scenarios in the Leaks section, specifying mass rates and fluid properties
- Navigate to Targets in the list view and click the orange "Releases" button on any target
- Assign leaks to the target using the intuitive modal interface
- Calculate pool sizes using the Auto-Calculate feature or enter values manually
- Visualize results on the map as Surface Pool Hazard Zone layers
"The Target Releases feature transforms DORAS from an impact probability tool into a complete consequence modeling platform, giving operators the visibility they need to make informed risk management decisions."
Visualization and Reporting
Each assigned release generates a visual hazard zone on the interactive map. These zones are displayed as orange polygons that represent the calculated surface pool extent around your targets. You can toggle individual release layers on and off, making it easy to compare different scenarios. The reporting system has been enhanced with new chart types including Release Frequency by Target, Pool Size comparisons, and aggregated Fluid Release analysis. Technical appendices now include comprehensive release data for regulatory submissions and risk assessments.
Release Frequency Classification
Following DNV-RP-F107 standards, the system classifies releases into three categories:
- R0 (No Release): Target damaged but containment maintained
- R1 (Small Release): Minor fluid release from damaged target
- R2 (Major Release): Significant release or complete inventory loss
These classifications are calculated using conditional probabilities based on impact energy levels and target-specific damage thresholds.
Conclusion
The Target Releases feature represents a significant step forward in offshore risk assessment capabilities. By combining rigorous hydrodynamic modeling with an intuitive user interface, DORAS now enables you to understand the full consequence chain from dropped object through to surface environmental impact. We encourage all users to explore this new functionality and incorporate release modeling into their risk assessment workflows. As always, our support team is available to assist with any questions about implementing these advanced features in your studies. For more information about DORAS and its risk assessment capabilities, visit our documentation or contact our technical support team.