On December 10, 2018, the NRC issued a Severity Level III Notice of Violation to Comanche Peak Nuclear Power Plant for violations of 10 CFR 50.9, "Completeness and accuracy of information" and 10 CFR 50, Appendix B, Criterion XVII, "Quality Assurance Records." Specifically, the violation involved a condition report completed by a licensed operator, regarding an unexplained plant water level transient while shutdown, which documented false potential causes for the transient and for the potential condition adverse to quality which ultimately led to confusion regarding a plant system's status. The actual cause of the event was not a plant component failure but an underlying procedure violation not originally reported to plant supervision and known to be so by the operator responsible for the condition report.