Company: TVC
Filing Date: 2025-11-13
Form Type: 10-K
Source: 0001376986-25-000056
Chunk: 330

Company: Tennessee Valley Authority
Filing Date: 2025-11-13
Form: 10-K
Item: Item 1
Chunk 330
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 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.

Power Operations Performance IndicatorWeightThresholdTargetStretchActualCombined Cycle Equivalent Forced Outage Rate(1)45%5.5%4.5%2.7%1.8%Hydro Equivalent Forced Outage Rate(2)25%6.0%5.6%3.2%2.0%Coal Equivalent Forced Outage Rate(3)25%13.9%11.0%8.1%6.0%Combustion Turbine Economic Starting Reliability(4)5%99.1%99.4%99.7%99.1%

Notes

(1)  Combined Cycle Equivalent Forced Outage Rate (“EFOR”) measures the generation lost due to forced events as a percentage of time the unit would have been scheduled to run for TVA-operated combined cycle generating assets, based on Generating Availability Data System (“GADS”) event reporting guidelines for megawatt hour losses. Combined Cycle EFOR excludes GADS events classified as outside management control and variances.

(2)  Hydro EFOR reflects the percentage of time over a given period that a generating unit is in forced outage.  This measure includes startup failures and is based on GADS event reporting guidelines for megawatt hour losses.  Hydro EFOR excludes GADS events classified as outside management control and variances.

(3)  Coal EFOR reflects the percentage of time over a given period that a generating unit is in forced outage.  This measure includes startup failures and is based on GADS event reporting guidelines for megawatt hour losses. Coal EFOR excludes GADS events classified as outside management control and variances.

(4)  Combustion Turbine ("CT") Economic Starting Reliability reflects the percentage of successful attempts to start up a unit for generation, performance testing, or black start over a given period that a generating unit was available for TVA-operated CT assets. Total unit performance tests demonstrate that a unit will start and perform as intended.  Black start tests demonstrate that a