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Nuclear update: Total availability dips with Comanche Peak 2 outage

Total U.S. nuclear plant availability took a step back early June 6 to 91.53%, down from the 92.22% on June 5 and also below the 93.63% reported on the same day last year.

Pulling down total production was the loss of Vistra Energy Corp.'s Comanche Peak 2 in Texas. The unit was offline early June 6 after being pegged at 71% the day prior. The reason for the outage was not disclosed.

In addition, three other units were curtailed. Exelon Corp.'s Braidwood 1 plant in Illinois was at 90% early June 6, down from 100% power on June 5. Ameren Corp.'s Callaway unit in Missouri was pegged at 60% early June 6, slipping from 70% on June 5. Entergy Corp.'s River Bend 1 in Louisiana saw production fall from 91% on June 5 to 76% early June 6.

Working to offset the outage and the curtailments was increased output at a handful of units. Duke Energy Corp.'s Brunswick 2 in North Carolina, Dominion Energy Inc.'s Surry 2 in Virginia and Xcel Energy Inc.'s Monticello unit in Minnesota were all operating at 100% power early June 6, each up from prior day levels of 84%, 71% and 85%, respectively. Exelon's Clinton Power Station in Illinois saw output rise from 85% on June 5 to 99% early June 6.

Tennessee Valley Authority's Sequoyah 2 in Tennessee was warming up at 2% early June 6. The unit was offline on June 5 for undisclosed reasons.

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