Dec. 20 (Bloomberg) -- U.S. nuclear output was little changed as the Tennessee Valley Authority shut its Sequoyah 1 unit in Tennessee after an electrical fire and Southern Co. started its Hatch 1 reactor in Georgia, the Nuclear Regulatory Commission reported.
Production from U.S. plants increased by 1 megawatt from Dec. 17 to 96,516 megawatts, or 95 percent of capacity, according to the report today from the NRC and data compiled by Bloomberg. Four of 104 power reactors were offline.
The Tennessee Valley Authority shut its 1,148-megawatt Sequoyah 1 reactor after crews found an electrical fire in its turbine building early today.
“The Unit 1 reactor was tripped to remove power from the generator bus,” the NRC said. A fire brigade sprayed water to extinguish the fire by 1 a.m. local time, it said.
The 1,126-megawatt Unit 2 at the plant, located 17 miles (27 kilometers) northeast of Chattanooga, Tennessee, was unaffected and is operating at full capacity.
Southern Co. switched on its 876-megawatt Hatch 1 reactor after repairing a feedwater pump. The fault was found on Dec. 10 and repairs were delayed so the reactor could supply power to the electricity grid during a cold snap, Alyson Fuqua, a spokeswoman at the plant, said by e-mail on Dec. 16.
The unit is operating at 67 percent of capacity. Another reactor at the site, the 883-megawatt Hatch 2, is operating at full power. The plant is located 74 miles west of Savannah, Georgia.
Exelon Corp. slowed its 619-megawatt Oyster Creek reactor in New Jersey to 20 percent of capacity from 65 percent on Dec. 17 after crews replaced a faulty transformer that was installed last month.
The plant has operated at reduced power since Dec. 12. It is 33 miles north of Atlantic City.
Exelon reduced output from the 1,134-megawatt Limerick 2 reactor in Pennsylvania to 79 percent of capacity from 100 percent on Dec. 17.
The Limerick generating station is about 30 miles northwest of Philadelphia. Another reactor at the site, the 1,134-megawatt Limerick 1, is operating at full capacity.
NextEra Energy Inc. increased output at its 693-megawatt Turkey Point 4 reactor to full power from 1 percent of capacity on Dec. 17. Another 693-megawatt reactor at the site, Turkey Point 3, is operating at full power. The plant is located 20 miles south of Miami.
Energy Northwest boosted its 1,190-megawatt Columbia reactor in Washington to 97 percent of capacity from 65 percent on Dec. 17 after repairing leaking steam relief valves. The plant is located 55 miles northwest of Walla Walla.
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