Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanismSection2aAssessmentResultExtensions.cs
===================================================================
diff -u -rb2c2de54d01023376a23ccaf60284acff15367bc -r965da6f2a3618e9e89dd8c4c3d816f82fdee0332
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanismSection2aAssessmentResultExtensions.cs	(.../PipingFailureMechanismSection2aAssessmentResultExtensions.cs)	(revision b2c2de54d01023376a23ccaf60284acff15367bc)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanismSection2aAssessmentResultExtensions.cs	(.../PipingFailureMechanismSection2aAssessmentResultExtensions.cs)	(revision 965da6f2a3618e9e89dd8c4c3d816f82fdee0332)
@@ -55,14 +55,14 @@
             if (calculationScenarios.Any())
             {
                 double totalAssessmentLayerTwoA = 0;
-                foreach (PipingCalculationScenario calculationScenario in calculationScenarios)
+                foreach (PipingCalculationScenario scenario in calculationScenarios)
                 {
-                    DerivedPipingOutput derivedOutput = DerivedPipingOutputFactory.Create(calculationScenario.Output,
+                    DerivedPipingOutput derivedOutput = DerivedPipingOutputFactory.Create(scenario.Output,
                                                                                           failurMechanism.PipingProbabilityAssessmentInput,
                                                                                           assessmentSection.FailureMechanismContribution.Norm,
                                                                                           failurMechanism.Contribution);
 
-                    totalAssessmentLayerTwoA += derivedOutput.PipingProbability * calculationScenario.Contribution;
+                    totalAssessmentLayerTwoA += derivedOutput.PipingProbability * (double) scenario.Contribution;
                 }
                 return totalAssessmentLayerTwoA;
             }