On May 18, 2021, the NRC issued a Severity Level III Notice of Violation to Entergy Operations, Inc. (Licensee), for a violation of 10 CFR 50, Appendix B, Criterion V at Waterford Steam Electric Station, Unit 3. Specifically, licensee contract employees at the direction of their superintendent disconnected an equipment protective device and drilled through embedded structural steel reinforcing bar in a safety-related wall without first obtaining the required approval.