Exelon Generation's Three Upstate Nuclear Plants Ran At Full Capacity During Winter Storm Grayson

As Winter Storm Grayson pounded the East Coast with high winds, bone-chilling temperatures and historic power demands, Exelon Generation's Upstate New York nuclear facilities, including R.E. Ginna, Nine Mile Point and FitzPatrick, operated at 100 percent power, delivering critical electricity to more than three million homes and businesses during near-record levels of demand for power.

Similar to the Polar Vortex, Winter Storm Grayson caused massive spikes in electricity demand. According to the New York Independent System Operator (NYISO), the highest demand during the storm reached 25,081 megawatts on Jan. 5, approaching NYISO's record winter peak demand of 25,738 megawatts, which was set on Jan. 7, 2017. During the Polar Vortex of 2014, Exelon Generation's nuclear fleet operated at 95 percent capacity.

"Our performance this past week helps demonstrate nuclear power's reliability and resiliency nationally," said Chief Nuclear Officer Bryan Hanson. "Millions of people count on the electricity our nuclear facilities provide, in homes, businesses, schools and hospitals, so we prepare for winter all year long to meet our reliability commitments."

All 14 Exelon Generation nuclear facilities operate more than 90 percent of the time, even though the reactors are taken offline for refueling outages every 18 to 24 months. With on-site fuel and 18- to 24-month operating cycles, Exelon Generation's nuclear plants don't face fuel availability or delivery problems in inclement weather.

Winter resiliency and reliability requires year-long planning, preparation and maintenance. Exelon Generation workers spend months ensuring that backup generators and spare equipment is ready for inclement weather. This fall, operators and maintenance personnel inspected freeze protection systems, tested electrical equipment, and properly aligned plant systems to prepare all Exelon Generation facilities for sub-zero temperatures, icy conditions and heavy snowfall. These efforts are in addition to the many equipment upgrades and "winter readiness" maintenance activities performed during refueling outages.

Exelon Generation, a subsidiary of Exelon Corporation (NYSE: EXC), is one of the largest, most efficient clean energy producers in the U.S., with a generating capacity of more than 35,500 megawatts. Exelon Generation operates the largest U.S. fleet of carbon-free nuclear plants with 20,300 megawatts of capacity from 23 reactors at 14 facilities in Illinois, Maryland, New Jersey, New York and Pennsylvania. Exelon Generation also operates a diverse mix of wind, solar, landfill gas, hydroelectric, natural gas and oil facilities in 18 states with more than 15,200 megawatts. Exelon Generation has an industry-leading safety record and is an active partner and economic engine in the communities it serves by providing jobs, charitable contributions and tax payments that help towns and regions grow. Follow Exelon Generation on Twitter @ExelonGen, view the Exelon Generation channel on YouTube, and visit: http://www.exeloncorp.com/companies/exelon-generation .

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