diff --git a/scripts/constant.py b/scripts/constant.py
index c719768..1eb3992 100644
--- a/scripts/constant.py
+++ b/scripts/constant.py
@@ -96,6 +96,7 @@
 DELETE_ROOT_NETWORKS = STUDY_SERVER_URL + "/supervision/root-networks"
 
 GET_DIRECTORY_ELEMENTS = DIRECTORY_SERVER_URL + "/supervision/elements"
+GET_UNMODIFIED_DIRECTORY_ELEMENTS = DIRECTORY_SERVER_URL + "/supervision/elements/unmodified"
 GET_SUPERVISION_STUDIES = STUDY_SERVER_URL + "/supervision/studies"
 GET_DYNAMIC_MAPPING_FILTERS = DYNAMIC_MAPPING_SERVER_URL + "/supervision/filters"
 
@@ -122,6 +123,7 @@
 RECREATE_STUDY_INDICES = STUDY_SERVER_URL + "/supervision/studies/indices"
 DELETE_STUDY_INDEXED_EQUIPMENTS_BY_NETWORK_UUID = STUDY_SERVER_URL + "/supervision/studies/{networkUuid}/indexed-equipments-by-network-uuid"
 DELETE_STUDY_NODES_BUILDS = STUDY_SERVER_URL + "/supervision/studies/{studyUuid}/nodes/builds"
+INVALIDATE_STUDY = STUDY_SERVER_URL + "/supervision/studies/{studyUuid}/invalidate"
 GET_STUDIES_INDEXED_STUDIES_COUNT = STUDY_SERVER_URL + "/supervision/studies/indexation-count"
 GET_STUDIES_INDEXED_EQUIPMENTS_COUNT = STUDY_SERVER_URL + "/supervision/equipments/indexation-count"
 GET_STUDIES_INDEXED_TOMBSTONED_EQUIPMENTS_COUNT = STUDY_SERVER_URL + "/supervision/tombstoned-equipments/indexation-count"
diff --git a/scripts/functions/studies/studies.py b/scripts/functions/studies/studies.py
index 503cfe1..624bc7f 100644
--- a/scripts/functions/studies/studies.py
+++ b/scripts/functions/studies/studies.py
@@ -36,4 +36,7 @@ def delete_indexed_equipments(networkUuid):
 
 def invalidate_nodes_builds(study_uuid):
     return requests.delete(constant.DELETE_STUDY_NODES_BUILDS.format(studyUuid = study_uuid))
+
+def invalidate_study(study_uuid):
+    return requests.delete(constant.INVALIDATE_STUDY.format(studyUuid = study_uuid))
     
diff --git a/scripts/invalidate_unmodified_studies.py b/scripts/invalidate_unmodified_studies.py
new file mode 100644
index 0000000..0593c91
--- /dev/null
+++ b/scripts/invalidate_unmodified_studies.py
@@ -0,0 +1,105 @@
+#
+# Copyright (c) 2026, RTE (http://www.rte-france.com)
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+import sys
+import requests
+import constant
+from functions.studies.studies import invalidate_study
+from tqdm import tqdm
+
+#
+# Invalidates built nodes and delete initial variant network for all studies that have not been modified since a given duration.
+#
+# Usage:
+#   python invalidate_unmodified_studies.py <duration> [--dry-run] [--limit <n>]
+#
+# Arguments:
+#   duration              ISO 8601 duration (e.g. P365D for 1 year, P30D for 30 days, PT24H for 24 hours)
+#   --dry-run             Optional flag to only list affected studies without performing any invalidation
+#   --limit <n>      Optional maximum number of studies to process
+#
+# Example:
+#   python invalidate_unmodified_studies.py P365D --dry-run
+#   python invalidate_unmodified_studies.py P365D --limit 10 --dry-run
+#
+
+#
+# @author Hugo Marcellin <hugo.marcellin_externe at rte-france.com>
+#
+
+def get_unmodified_studies(duration):
+    response = requests.get(constant.GET_UNMODIFIED_DIRECTORY_ELEMENTS, params={"elementType": "STUDY", "duration": duration})
+    response.raise_for_status()
+    return response.json()
+
+def invalidate_unmodified_studies(duration, dry_run=False, limit=None):
+    if constant.DEV:
+        print(f"\nDEV={str(constant.DEV)} -> hostnames configured for a local execution (172.17.0.1:xxxx)")
+
+    print(f"Fetching studies not modified since {duration}...")
+    studies = get_unmodified_studies(duration)
+
+    if not studies:
+        print("No unmodified studies found.")
+        return
+
+    print(f"Found {len(studies)} unmodified study/studies.")
+
+    if limit is not None and limit < len(studies):
+        print(f"Limit applied: processing {limit} out of {len(studies)} studies.")
+        studies = studies[:limit]
+
+    print("Selected studies:")
+    for study in studies:
+        print(f"  - {study['elementUuid']} | {study['elementName']} | last modified: {study['lastModificationDate']}")
+
+    if dry_run:
+        print("\nDry run mode: no study will be invalidated.")
+        return
+
+    print("\nUnmounting studies...")
+    success_count = 0
+    failure_count = 0
+    for study in tqdm(studies):
+        try:
+            study_uuid = study["elementUuid"]
+            result = invalidate_study(study_uuid)
+            result.raise_for_status()
+            success_count += 1
+        except Exception as e:
+            failure_count += 1
+            tqdm.write(f"  FAILED - {study_uuid} (error: {str(e)})")
+            if isinstance(e, requests.exceptions.RequestException) and e.response is not None:
+                tqdm.write("Response body: " + repr(e.response.text)) # repr for cheap escaping
+            tqdm.write("") # emtpy newline between errors for legibility
+
+    print(f"\nDone. {success_count} succeeded, {failure_count} failed.")
+
+
+if len(sys.argv) < 2:
+    print("Usage: python invalidate_unmodified_studies.py <duration> [--dry-run] [--limit <n>]")
+    print("Example: python invalidate_unmodified_studies.py P365D --limit 10 --dry-run")
+    sys.exit(1)
+
+duration_arg = sys.argv[1]
+dry_run_arg = "--dry-run" in sys.argv
+
+limit_arg = None
+if "--limit" in sys.argv:
+    limit_index = sys.argv.index("--limit")
+    if limit_index + 1 >= len(sys.argv):
+        print("Error: --limit requires a numeric value.")
+        sys.exit(1)
+    try:
+        limit_arg = int(sys.argv[limit_index + 1])
+        if limit_arg <= 0:
+            raise ValueError
+    except ValueError:
+        print("Error: --limit must be a positive integer.")
+        sys.exit(1)
+
+invalidate_unmodified_studies(duration_arg, dry_run=dry_run_arg, limit=limit_arg)