Cooper trips offline, unscheduled outage underway

[Core Content]

Cooper, Brownville, Nebraska.

Cooper entered an unscheduled outage, reaching 0% power according to the NRC daily report of Nov 10, 2026. This event brings the unit's forced-outage count to 2 so far in 2026, compared to 0 in all of 2025. NukeWorker projects the duration of this outage to be about 5 days.

BROWNVILLE, NE. Cooper entered an unscheduled outage and was at 0% power in the NRC's Nov 10, 2026 daily power report. The NRC has not yet issued an event notification for this trip; a follow-up reply will be posted here if one is filed.

This is the second unscheduled outage of 2026 for the unit.

Based on the unit's history and similar reactor types, projected total duration is about 5 days.

Across the U.S. fleet of 94 commercial reactors, today's combined capacity factor is 84.2% (12 units currently refueling, 3 units in unscheduled outages), below the 88.0% baseline for this month over the past five years. Point Beach 2 and Summer also experienced unscheduled outages within the past week. While the unit is down, that takes about 618,000 homes' worth of generation off the grid.

Cooper is a 772-MW General Electric BWR/4 operated by Nebraska Public Power District (commercial operation since 1974). Ownership history: Entergy took over managing it from Nebraska Public Power District in October 2003, and Nebraska Public Power District took over managing it from Entergy in March 2022. Its operating license runs through 2034 (renewed in 2010).

View Cooper's ratings, history, projections, and current status on NukeWorker. This thread will follow the restart and power ascension. Get a free email alert the moment it comes back online.

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Sources: NRC Daily Reactor Power Status reports, validated outage schedules, and NukeWorker's projections.