NRC CAL – NOV (White)

On April 15, 2019, the NRC issued a Notice of Violation to Tennessee Valley Authority (TVA), for a violation of Title 10 of the Code of Federal Regulations (10 CFR) Part 50.47, Part 50.54, and Appendix E to 10 CFR Part 50, at Watts Bar Nuclear Plant (Watts Bar) associated with a White Significance Determination Process finding. TVA's staff at Watts Bar failed to adequately maintain emergency action level thresholds affecting emergency preparedness. Specifically, since each Watts Bar unit's initial plant startup, the licensee failed to adequately maintain radiation monitor effluent parameter calculations that resulted in non-conservative emergency action level thresholds.