Company: TVC
Filing Date: 2025-07-29
Form Type: 10-Q
Source: 0001376986-25-000044
Chunk: 121

Company: Tennessee Valley Authority
Filing Date: 2025-07-29
Form: 10-Q
Item: Part I, Item 3
Chunk 121
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 minus RFO and exempt losses in a normal fuel cycle period, per standard industry guidelines.  This measure monitors performance between refueling outages to obtain high unit and energy production reliability.

Transmission Performance IndicatorWeightThresholdTargetStretchLoad Not Served (1)60%4.43.73.0Outages per Hundred Miles per Year (2)20%2.872.612.35Connection Point Interruption Frequency (3)20%0.640.530.42

Notes

(1)  Load Not Served ("LNS") is a measure of the magnitude and duration of transmission system outages that affect TVA customers expressed in system minutes.  TVA manages this critical indicator to reduce the impact of customer outages.  An automatic customer interruption with a duration of one minute or greater is tracked as an LNS event.  LNS events caused by TVA on a distributor system will also count as a TVA event even if the TVA system remains energized.  LNS excludes interruptions due to declared major events, variances, verified tornadoes, gunfire, vandalism, ice formation, and foreign object/vehicle (DUI, DWI, hit and run, or suicide).

(2)  Outages per Hundred Miles per Year ("OHMY") is the number of automatic interruptions (sustained and momentary) to lines greater than or equal to 100-kV per 100 miles of transmission line per year.  OHMY excludes interruptions due to declared major events, variances, verified tornadoes, gunfire, vandalism, ice formation, foreign object/vehicle (DUI, DWI, hit and run, or suicide), and nested interruptions.

(3)  Connection Point Interruption Frequency ("CPIF") measures reliability from the customer's perspective.  CPIF tracks interruptions of power, including momentary interruptions, at connection points caused by the transmission system.  CPIF includes automatic and emergency forced outages and excludes prearranged (scheduled or planned) and operational outages as well as interruptions due to declared major events, variances, verified tornadoes, gunfire, vandalism, ice formation, and foreign object/vehicle (DUI, DWI, hit and run, or suicide).

Generation Performance IndicatorWeightThresholdTargetStretchCombined Cycle Equivalent Forced Outage Rate (1)45%4.5%3.8%2.0%Hydro Equivalent Forced Outage Rate (2)25%5.7%4.2%2.0%Coal Equivalent