Tennessee Valley Authority published its 20-year integrated resource plan, which calls for more renewable energy resources, nuclear capacity and natural gas-fired generation and the likelihood of coal-fired retirements.

TVA said its IRP will serve as a roadmap for identifying the resource options required to meet the energy needs of the Tennessee Valley region over the next 20 years. It is consistent with TVA’s Environmental Policy and its  vision to become one of the nation’s leading providers of low-cost and cleaner energy by 2020.

TVA anticipates adding 1,500 to 2,500 MW of renewable energy nameplate capacity by 2020. Current wind contracts totaling more than 1,600 MW are included in this range.

TVA also expects to add 1,150 to 5,900 MW of new nuclear generating capacity by 2029. Capacity from a completed Watts Bar Unit 2 represents the lower end of the range.

Natural gas additions could range from 900 to 9,300 MW by 2029. TVA expects to use natural gas as an "intermediate supply source" and included completion of the John Sevier combined cycle plant at the lower end of the range.

Up to 900 MW of new coal-fired capacity with carbon capture was recommended between 2025 and 2029. The plan anticipates idling 2,400 to 4,700 MW of coal-fired capacity by 2017. The plan recommends considering increasing the amount of coal-fired capacity idled. TVA previously announced plans to idle 1,000 MW of capacity, which is included in the lower end of the range.

TVA also expects the equivalent of 3,600 to 5,100 MW of capacity to come through energy efficiency improvements and demand response initiatives by 2020.

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