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SECTION 2.0:PROJECT DESCRIPTION <br /> The percent of time that the combined-cycle power plant is projected to be operated is <br /> defined as the"service factor." The service factor considers the amount of time that a unit is <br /> operating and generating power,whether at full or partial load. The projected service factor <br /> for the combined-cycle power block,which considers projected percent of time of operation, <br /> differs from the equivalent availability factor (EAF),which considers the projected percent <br /> of energy production capacity achievable. <br /> The EAF may be defined as a weighted average of the percent of full energy production <br /> capacity achievable. The projected equivalent availability factor for the LEC is estimated to <br /> be approximately 88 to 96 percent. <br /> The EAF,which is a weighted average of the percent of energy production capacity <br /> achievable, differs from the"availability of a unit," which is the percent of time that a unit is <br /> available for operation,whether at full load,partial load, or standby. <br /> 2.5.2 Redundancy of Critical Components <br /> The following subsections identify equipment redundancy as it applies to project <br /> availability. Specifically,redundancy in the combined-cycle power block and in the <br /> balance-of-plant systems that serve it is described. The combined-cycle power block will be <br /> served by the following balance-of-plant systems: fuel supply system,DCS,boiler feedwater <br /> system,condensate system, demineralized water system,power cycle makeup and storage, <br /> circulating water system, open-cycle cooling water system,and compressed air system. <br /> Major equipment redundancy is summarized in Table 2.5-1. <br /> TABLE 2.5-1 <br /> Major Equipment Redundancy <br /> Description Number Note <br /> Combined-cycle CTG One train Steam turbine bypass system allows CTG train to operate <br /> and HRSG at base load with the steam turbine out of service <br /> STG One See note above pertaining to CTG and HRSG <br /> HRSG feedwater Two Each has 100 percent capacity for unfired operation <br /> pumps <br /> Condensate pumps Three—50 percent capacity <br /> Condenser One Condenser must be in operation for plant to operate, <br /> however, it will include divided waterboxes <br /> Circulating water Two—50 percent capacity Steam turbine may continue to operate at a higher <br /> pumps backpressure with one of two circulating water pumps out <br /> of service <br /> Cooling tower One Cooling tower is a 7-cell mechanical draft design <br /> Natural Gas Two— 100 percent capacity <br /> Compressors <br /> SACI371322I082340003(LEC_2.0_PROJECT_DESC.DOC) 2-37 <br />