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Nuclear update: Salem, Millstone units drop offline for refueling

The loss of two Northeast nuclear reactors tugged total U.S. nuclear power plant availability down to 86.72% by early Oct. 13, down from 88.85% the day prior but still well above the 79.83% rating seen on the same day in 2016.

The decline was led by the loss of Dominion Energy Inc.'s Millstone 3 in Connecticut and Public Service Enterprise Group Inc.'s Salem 1 reactor in New Jersey. Private sources indicate that both units were scheduled to shut for refueling.

In addition, Duke Energy Corp.'s Shearon Harris plant in North Carolina saw output plunge to just 27% by early Oct. 13, down from full capacity the day prior.

Partially offsetting the lost supply, two other units ramped output. Dominion's North Anna 2 plant in Virginia saw production rise from 75% on Oct. 12 to 98% early Oct. 13 while Entergy Corp.'s Grand Gulf 1 in Mississippi was pegged at 93% early Oct. 13, up from 85% on Oct. 12.

As of early Oct. 13, 11 nuclear reactors across the country are offline.

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