Cumulation sets

Cumulation sets in RISKCURVES are essential tools for aggregating results from different risk sources, providing comprehensive Societal Risk (SR) or Individual Risk (IR) analyses. This feature is particularly useful for evaluating combined risks from multiple pieces of equipment or scenarios, allowing users to distinguish between different risk profiles such as flammable hazards versus toxic scenarios, or specific types of equipment.

The cumulation set is found at the bottom of the project tree, above the comparison set node. The cumulation set allows users to include or exclude specific scenarios, calculation sets, or imported calculations through a list of checkboxes.

Creating and using cumulation sets

• Add a cumulation set

  • Right-click on the "Cumulation sets” node in the project tree.

  • Select <Add cumulation set> from the context menu.

• Rename the cumulation set

  • Select the newly created cumulation set.

  • Press <F2> when the cumulation set is selected or click and hold on the name to rename it.

• Select scenarios to be accumulated

  • Choose the scenarios, equipment or calculation sets to be accumulated from the tree in the input panel below the cumulation set.

• Calculate

  • After pressing the <Calculate> button, the subset results will be presented.

• Add Consequence Risks or Analysis Point (optional)

  • Similar to the calculation sets, you can add Consequence Risks and Analysis Points in the same way.

  • These nodes are available under each cumulation set node.

  • The results will only be influenced by the scenarios included in the cumulation set.

Note

Societal risk maps CANNOT be combined from different "Calculation sets" or "Imported calculations"

Viewing results in different tabs

Map tab

In the Map tab, the contours resulting from a combination of all selected scenarios are displayed on top of the background map. For more information on working with graphs in the results section, refer to the Map tab article.

Graphs tab

The Graphs tab combines all selected scenarios into an fN curve. For detailed instructions on working with graphs in the results section, refer to the Graphs tab article.

Report

The report considers only the selected scenarios for that specific cumulation set and includes:

• A list of scenarios with frequencies.

• Maximum effect distances.

• A societal risk ranking report.

Benefits of using cumulation sets

• Improved analysis: Gain a holistic view of risks by consolidating different data sets into one cumulative outcome.

• Comprehensive results: Achieve a single, combined result that reflects the entire site's or specific areas’ risk profiles.

• Incorporates various risk indicators:

  • Individual Risk iso-risk contours

  • Societal Risk graphs

  • Societal Risk maps

Conclusion

Cumulation sets in RISKCURVES are a powerful tool that aggregate results from various risk sources, offering a thorough analysis of societal and individual risks. By combining different data sets into a single outcome, they provide a dynamic and comprehensive view of site-wide risks, incorporating Individual Risk iso-risk contours, Societal Risk fN graphs, and Societal Risk maps for enhanced decision-making. Additionally, they can work with Analysis Points and Consequence Risks for even more detailed and insightful risk assessments.