diff --git a/src/main/java/com/interplug/qcast/biz/estimate/EstimateService.java b/src/main/java/com/interplug/qcast/biz/estimate/EstimateService.java
index a0a54477..9167da52 100644
--- a/src/main/java/com/interplug/qcast/biz/estimate/EstimateService.java
+++ b/src/main/java/com/interplug/qcast/biz/estimate/EstimateService.java
@@ -1369,7 +1369,8 @@ public class EstimateService {
 
       // file Name 명이 없는경우
       if (estimateRequest.getFileName() == null || "".equals(estimateRequest.getFileName())) {
-        estimateRequest.setFileName(estimateResponse.getObjectNo() + "_"
+        estimateRequest.setFileName(StringUtils.defaultString(estimateResponse.getObjectNo()) + "_"
+                + StringUtils.defaultString(estimateResponse.getPlanNo()) + "_"
                 + new SimpleDateFormat("yyyyMMdd").format(new Date()));
       }
 
diff --git a/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java b/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java
index f91ee097..39f6c618 100644
--- a/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java
+++ b/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java
@@ -2503,7 +2503,9 @@ public class PwrGnrSimService {
       // file Name 명이 없는경우
       if (estimateRequest.getFileName() == null || "".equals(estimateRequest.getFileName())) {
         estimateRequest.setFileName(
-            estimateResponse.getObjectNo()
+            StringUtils.defaultString(estimateResponse.getObjectNo())
+                + "_"
+                + StringUtils.defaultString(estimateResponse.getPlanNo())
                 + "_"
                 + new SimpleDateFormat("yyyyMMdd").format(new Date()));
       }