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Nuclear update: US output rises as several units ramp up production

Total U.S. nuclear plant availability rose early May 11 to 85.89%, up from 85.06% on May 10 and above the 77.86% reported on the same day a year ago.

Increased generation at several reactors across the country lifted total output.

FirstEnergy Corp.'s recently restarted Beaver Valley 1 in Pennsylvania was pegged at 55% early May 11, up from 15% on May 10. Tennessee Valley Authority's Browns Ferry 2 in Alabama was at 23% early May 11 after being taken offline May 7 for undisclosed reasons. Southern Co.'s Farley 1 in Alabama was warming up at 13% early May 11 after being shut early April for a refueling outage.

Duke Energy Corp.'s Shearon Harris Nuclear Power Plant in North Carolina saw production increase from 2% on May 10 to 30% early May 11. Southern Co.'s Hatch 2 in Georgia was at 95% early May 11, climbing from 50% on May 10. American Electric Power Co. Inc.'s Donald C. Cook 2 plant in Michigan was at 12% early May 11 after being idled March 1 for a refueling outage. NextEra Energy Inc.'s Point Beach 2 in Wisconsin, which was curtailed to 70% power May 10, was at full power early May 11.

Four curtailments offset the increase in production. Susquehanna 2 in Pennsylvania, which is owned by Riverstone Holdings LLC and Allegheny Electric Cooperative Inc., saw output slip from 100% on May 10 to 85% early May 11. Duke's Catawba 2 in South Carolina was at 65% early May 11, down from 100% on May 10. Exelon Corp.'s Byron 1 and Quad Cities 2 in Illinois saw output fall from 100% on May 10 to May 11 levels of 88% and 87%, respectively.

As of early May 11, a total of seven nuclear power plants remain offline.

For details of U.S. nuclear power plant operations, visit our Nuclear Availability and Status and Outage pages.