TVA Nuclear Preventive Maintenance

Based on our review of Preventive Maintenance (PM) metric data provided by the Tennessee Valley Authority (TVA), we determined PMs were generally being performed within established schedules at TVA’s nuclear plants; however, some metrics indicated performance could be improved. In addition, we found other areas where improvements are needed, including: (1) some discrepancies between TVA’s PM metrics data in Cognos (the business analytics reporting tool used across TVA to access and analyze company data) reports and the data submitted to an industry peer organization; (2) PMs needed that were not established, causing declines of equipment condition and a regulatory finding; and (3) recurring issues that prevented or delayed PMs being performed. Additionally, we identified obsolescence-related equipment issues at TVA’s nuclear plants. Specifically, obsolescence-related equipment issues were identified in many program, system, and component health reports as having a negative impact.