Cheatham County Generation Site EIS Scoping Report
3.2.1 Components of the CT Plant The new CT plant would be located within the CHG parcel (Figure 1). The Action Alternative would include the following actions at the CHG Site: • Construction of a new natural gas pipeline lateral and gas system to connect TVA’s CHG plant to an existing gas pipeline. • Pond(s) for holding and treating storm water flow as required. • A new 16-kV switchyard would be required onsite and would include standard equipment such as breakers, switches, surge arresters, voltage transformers, and buses with connections to new transmission lines and generator-step-up transformers. A new switch house would be constructed within the footprint of the new switchyard. • Construction of two to four double-circuit transmission lines, totaling approximately 35 to 45 miles, to connect to existing transmission lines in order to interconnect the new generation to the transmission system. • Upgrades to existing transmission lines may also be needed. • Aqueous ammonia systems for the selective catalytic reduction (SCR) system. • Fuel oil storage tanks. • New natural gas-fired dew point heaters. • Electric and diesel emergency firewater pumps. • All water for on-site use will be provided by Pleasant View Utility District (PVUD). • On-site gas compressor. The major CT plant components would include 10 dual-fuel aeroderivative CT generators, four gas-fired frame CT generators with inlet evaporative cooling and three natural gas-fired dew-point gas heaters. In addition to the major equipment systems, the proposed facilities include plant equipment and systems such as natural gas compressor station, natural gas metering and handling systems; instrumentation and control systems; transformers; and administration, warehouse, and maintenance buildings. A typical CT plant configuration similar to that proposed for the CHG site is illustrated in Figure 2.
Figure 2. Components of a Typical Combustion Turbine Generator
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