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Nuclear update: US output tops 92% as units return to grid

Total U.S. nuclear plant availability was higher early May 21, moving up to 92.60%, from 91.93% on May 18 and well above the 80.18% reported on the same day in 2017.

Working to lift total output across the country was the return of several reactors to the grid.

Nine Mile Point 2 in New York, which is owned by Exelon Corp., EDF Group and Long Island Power Authority, saw output at 100% as of early May 21, up from 71% on May 18.

Duke Energy Corp.'s Oconee 3 in South Carolina was operating at 100% early May 21. The reactor had been offline since the end of April for planned seasonal work.

Southern Co.'s Farley 1 in Alabama was running at 100% early May 21, up from 85% on May 18, and Exelon's Byron 1 in Illinois was pegged at 100% early May 21, increasing from 72% on May 18.

Exelon's Fitzpatrick reactor in New York was running at 74% early May 21, up from 52% on May 18. Entergy Corp.'s Arkansas Nuclear One in Arkansas was eyed at 15% early May 21. The reactor tripped from 100% late May 16.

Energy Northwest's Columbia Generation Station in Washington was offline early May 21 from full power. According to a report filed with the U.S. Nuclear Regulatory Commission, the reactor experienced a main transformer trip late May 18 that caused a reactor scram.

Southern's Hatch 2 in Georgia also was offline early May 21, down from 100% on May 18.

Tennessee Valley Authority's Browns Ferry 2 in Alabama was reported at 80% early May 21, down from 100% on May 18.

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