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Reliable Performance

Our fleet and grid performed admirably in 2010. Confronted with record-breaking temperatures — both winter and summer — Duke’s operating teams met the challenge of high load requirements. For example, the regulated fossil generation fleet had commercial availability of approximately 88.7 percent. The company’s nonregulated Midwest generation fleet also met customers’ needs while establishing record highs for total generation.

Industry data show that our nuclear fleet is among the most reliable in the nation at delivering low-cost baseload power. During 2010, our nuclear capacity factor was approximately 95.9 percent, which eclipsed the company’s previous annual record of approximately 95.2 percent in 2002.

Additionally, in 2010 Duke Energy’s Oconee Nuclear Station became the nation’s first nuclear plant to receive Nuclear Regulatory Commission approval to transition from an analog to a digital plant safety system. Upgrading these systems will help prevent unnecessary shutdowns and result in more reliable and simplified operations. The digital upgrade for all three Oconee units will be complete by 2013.

Strong productivity, operational performance and efficiency are good for our customers and communities. Investors also benefit when we reduce costs and increase profitability. (See Operational Performance Supports Our Affordable, Reliable, Clean Mission)

Duke Energy does business in a way that is good for people, the planet and profits. Our strategy was affirmed in 2010, as Duke Energy earned a place on the Dow Jones Sustainability World Index. We were one of only 15 electric utilities around the globe to be named to this elite index. Duke Energy also earned a place on the Dow Jones Sustainability North America Index for the fifth year in a row. You can read about our sustainability plan in this report. Our 2010|2011 Sustainability Report, available at www.duke-energy.com, has more details.