Index: Riskeer/Integration/src/Riskeer.Integration.IO/Exporters/HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporter.cs
===================================================================
diff -u -ra5f4b564140f1004712d27c36887835cc75de4dc -r3178fe8b6ae605b67d9b4dec9d73e36b8aa8c4d5
--- Riskeer/Integration/src/Riskeer.Integration.IO/Exporters/HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporter.cs	(.../HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporter.cs)	(revision a5f4b564140f1004712d27c36887835cc75de4dc)
+++ Riskeer/Integration/src/Riskeer.Integration.IO/Exporters/HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporter.cs	(.../HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporter.cs)	(revision 3178fe8b6ae605b67d9b4dec9d73e36b8aa8c4d5)
@@ -21,12 +21,12 @@
 
 using System;
 using System.Collections.Generic;
-using System.Globalization;
 using System.IO;
 using System.Linq;
 using Core.Common.Base.IO;
 using Core.Common.Util;
 using Riskeer.Common.Data.Hydraulics;
+using Riskeer.Common.Forms.Helpers;
 
 namespace Riskeer.Integration.IO.Exporters
 {
@@ -82,10 +82,8 @@
             string exportType = calculationsType == HydraulicBoundaryLocationCalculationsType.WaterLevel
                                     ? "Waterstanden"
                                     : "Golfhoogten";
-            
-            double returnPeriod = 1.0 / calculationsForTargetProbability.TargetProbability;
-            
-            var fileName = $"{exportType}_{returnPeriod.ToString(CultureInfo.InvariantCulture)}";
+
+            var fileName = $"{exportType}_{ReturnPeriodFormattingHelper.FormatFromProbability(calculationsForTargetProbability.TargetProbability)}";
             string filePath = Path.Combine(folderPath, $"{fileName}.shp");
 
             var exporter = new HydraulicBoundaryLocationCalculationsExporter(
Index: Riskeer/Integration/test/Riskeer.Integration.IO.Test/Exporters/HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporterTest.cs
===================================================================
diff -u -ra5f4b564140f1004712d27c36887835cc75de4dc -r3178fe8b6ae605b67d9b4dec9d73e36b8aa8c4d5
--- Riskeer/Integration/test/Riskeer.Integration.IO.Test/Exporters/HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporterTest.cs	(.../HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporterTest.cs)	(revision a5f4b564140f1004712d27c36887835cc75de4dc)
+++ Riskeer/Integration/test/Riskeer.Integration.IO.Test/Exporters/HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporterTest.cs	(.../HydraulicBoundaryLocationCalculationsForTargetProbabilitiesExporterTest.cs)	(revision 3178fe8b6ae605b67d9b4dec9d73e36b8aa8c4d5)
@@ -20,14 +20,14 @@
 // All rights reserved.
 
 using System;
-using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Security.AccessControl;
 using Core.Common.Base.IO;
 using Core.Common.TestUtil;
 using NUnit.Framework;
 using Riskeer.Common.Data.Hydraulics;
+using Riskeer.Common.Forms.Helpers;
 using Riskeer.Integration.IO.Exporters;
 
 namespace Riskeer.Integration.IO.Test.Exporters
@@ -157,7 +157,7 @@
 
         private static string GetReturnPeriodText(double targetProbability)
         {
-            return (1.0 / targetProbability).ToString(CultureInfo.InvariantCulture);
+            return ReturnPeriodFormattingHelper.FormatFromProbability(targetProbability);
         }
     }
 }
\ No newline at end of file