Detected events

Comanche Peak 2 returned to service (0% → 6%)

Oconee 3 returned to service (0% → 20%)

Peach Bottom 3 reduced its output from 100% to 55%

Hatch 2 reduced output from 100% to 80%

LaSalle 1 was taken offline (15% → 0%)

LaSalle 1 reduced its output from 100% to 15%

Brunswick 2 increased its output from 70% to 100%

Fermi 2 increased its power output from 59% to 82%

Brunswick 2 reduced output from 100% to 70%

Fermi 2 increased its power output from 10% to 59%

Fermi 2 returned to service (0% → 10%)

Limerick 1 increased its output from 62% to 100%

Prairie Island 1 increased its power output from 40% to 100%

Limerick 1 increased its output from 18% to 62%

Turkey Point 3 increased its power output from 77% to 100%

Vogtle 3 increased its power output from 47% to 75%

Watts Bar 1 increased its power output from 50% to 97%

Limerick 1 returned to service (0% → 18%)

Turkey Point 3 increased its capacity from 57% to 77%

Watts Bar 1 increased its power output from 11% to 50%

Fermi 2 was taken offline (57% → 0%)

Vogtle 3 increased its output from 16% to 48%

Fermi 2 increased its power output from 20% to 57%

Hatch 2 increased its power output from 40% to 79%

Prairie Island 1 reduced its output from 100% to 44%

Quad Cities 2 increased its power output from 18% to 100%

Hatch 2 increased its power output by 3% → 40%

Peach Bottom 2 increased its power output from 55% to 100%

Quad Cities 2 returned to service (0% → 18%)

Vogtle 3 returned to service (0% → 16%)

Hatch 2 returned to service (0% → 3%)

Millstone 2 increased power output from 55% to 99%

Peach Bottom 2 reduced its output from 100% to 55%

Watts Bar 1 returned to service (0% → 11%)

Sizewell B, Turbine 2: scheduled outage, 630 MW unavailable · statutory outage

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00147790 rev. 36 (Active), published August 12, 2026, at 23:57 UTC. BM Unit T_SIZB-2, participant BEGL001. Planned · Statutory: "47643 : Statutory Outage : .". Window May 16, 2026, 06:00 UTC → August 13, 2026, 04:00 UTC. Normal capacity 630 MW, available 0 MW.

Catawba 1 increased its output from 25% to 75%

Millstone 2 increased output by 8% → 55%

Catawba 1 returned to service (0% → 25%)

Grand Gulf 1 increased its power output from 55% to 100%

Millstone 2 returned to service (0% → 8%)

Grand Gulf 1 reduced its output from 100% to 55%

Fermi 2 returned to service (0% → 3%)

Turkey Point 3 returned to service (0% → 1%)

Unit 2 was taken offline (100% → 0%)

Salem 2 increased its power output from 71% to 100%

Salem 2 increased its output from 47% to 71%

Seabrook 1 increased its power output from 80% to 100%

Braidwood 2 increased its capacity from 55% to 84%

Quad Cities 2 was taken offline (100% → 0%)

Seabrook 1 increased its output from 48% to 80%

Susquehanna 1 increased its power output from 68% to 91%

Braidwood 2 increased its output from 17% to 55%

Columbia Generating Station increased its output from 60% to 100%

Palo Verde 2 increased its output from 19% to 69%

Salem 2 increased its output from 10% to 35%

Beaver Valley 2 increased its power output from 52% to 88%

Braidwood 2 returned to service (0% → 17%)

Salem 2 returned to service (0% → 10%)

Seabrook 1 returned to service (0% → 30%)

Oconee 3 went offline (99% → 0%)

Susquehanna 1 increased its power output from 47% to 78%

Hartlepool, Reactor 1: unscheduled outage, 620 MW unavailable · maintenance

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148176 rev. 58 (Active), published September 3, 2026, at 09:58 UTC. BM Unit T_HRTL-1, participant BEGL001. Unplanned · Maintenance: "52175: De-load for maintenance activities". Window May 5, 2026, 23:30 UTC → September 11, 2026, 06:30 UTC. Normal capacity 620 MW, available 0 MW.

Beaver Valley 2 increased its power output from 15% to 40%

Columbia Generating Station reduced its output from 100% to 45%

Palo Verde 2 returned to service (0% → 1%)

Susquehanna 1 returned to service (0% → 47%)

Beaver Valley 2 returned to service (0% → 15%)

Comanche Peak 2 went offline (93% → 0%)

Quad Cities 1 increased its power output from 75% to 100%

Arkansas Nuclear 2 increased its capacity from 61% to 82%

Browns Ferry 3 increased its power output from 77% to 100%

Cooper increased its output from 70% to 100%

Quad Cities 1 reduced its output from 100% to 75%

Saint-Laurent 1: Scheduled Shutdown

EDF, May 2, 2026: “Unit No. 1 was taken offline as part of a routine refueling outage...”. Tags: Maintenance.

Arkansas Nuclear 2 increased its output from 29% to 61%

Cooper reduced output from 100% to 70%

INES Event 2 · Cofrentes (Spain): Failure of the main steam line isolation valves (MSIV)

Classification according to the International Nuclear Event Scale (INES) of the incident reported by Cofrentes NPP due to the inoperability of the main steam line isolation for a period longer than permitted by Technical Specifications (TS) This report describes the event that was notified on May 1, 2026, after discovering the inoperability of several Main Steam Isolation Valves (MSIVs), when Cofrentes NPP was in col…

Arkansas Nuclear 2 returned to service (0% → 29%)

Browns Ferry 3 increased its power output by 1% → 94%

Browns Ferry 3 returned to service (0% → 1%)