diff --git a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActInfoRegistPopup.jsp b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActInfoRegistPopup.jsp
index bb34487..06c329e 100644
--- a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActInfoRegistPopup.jsp
+++ b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActInfoRegistPopup.jsp
@@ -262,7 +262,7 @@
             var newWindow = openPopup(url, 1400, 800, 'actnInfoManagePopup');
             if (newWindow) {
                 // 메인페이지 opener 참조를 새 팝업에 전달
-                newWindow.mainOpener = window.opener;
+                newWindow.opener = window.opener;
                 window.close();
                 // 현재 창은 닫지 않고 유지 (사용자가 다시 돌아올 수 있도록)
             } else {
diff --git a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActnInfoRegistPopup.jsp b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActnInfoRegistPopup.jsp
index 936b54d..19fda63 100644
--- a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActnInfoRegistPopup.jsp
+++ b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/crdnActInfo/crdnActnInfoRegistPopup.jsp
@@ -364,6 +364,7 @@
                     '&crdnNo=' + encodeURIComponent(self.crdnNo);
                 var newWindow = openPopup(url, 1200, 700, 'actInfoPopup');
                 if (newWindow) {
+                    newWindow.opener = window.opener;
                     window.close();
                 } else {
                     alert('팝업이 차단되었습니다. 팝업 차단을 해제해주세요.');
diff --git a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnImpltTask/impltTaskPopup.jsp b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnImpltTask/impltTaskPopup.jsp
index f973ece..bd03cec 100644
--- a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnImpltTask/impltTaskPopup.jsp
+++ b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnImpltTask/impltTaskPopup.jsp
@@ -382,8 +382,9 @@
                             '&crdnYr=' + encodeURIComponent(ImpltTaskPopup.crdnYr) +
                             '&crdnNo=' + encodeURIComponent(ImpltTaskPopup.crdnNo) +
                             '&impltTaskSeCd=' + encodeURIComponent(ImpltTaskPopup.impltTaskSeCd);
-                        var newWindow = openPopup(url, 1600, 1200, 'levyPrvntcPopup');
+                        var newWindow = openPopupSafe(url, 1600, 1200, 'levyPrvntcPopup');
                         if (newWindow) {
+                            newWindow.opener = window.opener;
                             window.close();
                         } else {
                             alert('팝업이 차단되었습니다. 팝업 차단을 해제해주세요.');
diff --git a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnLevyPrvntc/levyPrvntcPopup.jsp b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnLevyPrvntc/levyPrvntcPopup.jsp
index b9562d6..0452f4d 100644
--- a/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnLevyPrvntc/levyPrvntcPopup.jsp
+++ b/src/main/webapp/WEB-INF/views/crdn/crndRegistAndView/main/crdnLevyPrvntc/levyPrvntcPopup.jsp
@@ -1189,7 +1189,7 @@
                         var newWindow = openPopup(url, 1200, 658, 'impltTaskPopup');
                         if (newWindow) {
                             // 메인페이지 opener 참조를 새 팝업에 전달
-                            newWindow.mainOpener = window.opener;
+                            newWindow.opener = window.opener;
                             window.close();
                         } else {
                             alert('팝업이 차단되었습니다. 팝업 차단을 해제해주세요.');