Detected events

SADI demand 3.4% higher than expected (15,514 MW vs. 14,998 MW)

CAMMESA, actual SADI demand versus projected demand, reading at 1:00 a.m. Temperature 8.7 °C.

Thermal power generation increased by 265 MW in 5 minutes (8,278 → 8,543 MW)

CAMMESA, generation by SADI Total technology, readings at 7:25 p.m. and 7:30 p.m.

Hydropower generation increased by 551 MW in 5 minutes (4,973 → 5,523 MW)

CAMMESA, generation by SADI Total technology, readings at 6:40 p.m. and 6:45 p.m.

Hydropower generation increased by 270 MW in 5 minutes (4,704 → 4,974 MW)

CAMMESA, generation by SADI technology, readings at 6:30 p.m. and 6:35 p.m.

Renewable generation fell by 242 MW in 5 minutes (3,475 → 3,233 MW)

CAMMESA, generation by SADI Total technology, readings at 6:30 p.m. and 6:35 p.m.

Renewable generation fell by 210 MW in 5 minutes (3,685 → 3,475 MW)

CAMMESA, generation by SADI Total technology, readings at 6:25 p.m. and 6:30 p.m.

Hydropower generation increased by 252 MW in 5 minutes (4,230 → 4,482 MW)

CAMMESA, generation by SADI Total technology, readings at 6:20 p.m. and 6:25 p.m.

Renewable generation dropped by 246 MW in 5 minutes (3,931 → 3,685 MW)

CAMMESA, generation by SADI Total technology, readings at 6:20 p.m. and 6:25 p.m.

Renewable generation fell by 271 MW in 5 minutes (4,392 → 4,122 MW)

CAMMESA, SADI total generation by technology, readings at 6:10 p.m. and 6:15 p.m.

Thermal power generation increased by 268 MW in 5 minutes (6,317 → 6,585 MW)

CAMMESA, SADI total generation by technology, readings at 6:00 p.m. and 6:05 p.m.

Hydropower generation increased by 279 MW in 5 minutes (3,802 → 4,081 MW)

CAMMESA, generation by SADI Total technology, readings at 5:55 p.m. and 6:00 p.m.

Imported generation fell by 432 MW in 5 minutes (469 → 37 MW)

CAMMESA, generation by technology from the SADI total, readings at 5:55 p.m. and 6:00 p.m.

Imported generation increased by 272 MW in 5 minutes (12 → 284 MW)

CAMMESA, generation by SADI Total technology, readings at 5:20 p.m. and 5:25 p.m.

Hydropower generation increased by 337 MW in 5 minutes (3,325 → 3,663 MW)

CAMMESA, generation by SADI Total technology, readings at 4:00 p.m. and 4:05 p.m.

SADI demand 3.3% below forecast (16,197 MW vs. 16,742 MW)

CAMMESA, actual SADI demand versus forecasted demand, reading at 4:00 p.m. Temperature 19.6 °C.

Generation from imports fell by 350 MW in 5 minutes (444 → 94 MW)

CAMMESA, generation by SADI Total technology, readings at 2:40 p.m. and 2:45 p.m.

Imported generation increased by 355 MW in 5 minutes (88 → 444 MW)

CAMMESA, generation by SADI Total technology, readings at 2:35 p.m. and 2:40 p.m.

Hydropower generation fell by 281 MW in 5 minutes (3,760 → 3,479 MW)

CAMMESA, generation by SADI Total technology, readings at 2:00 p.m. and 2:05 p.m.

Generation from imports fell by 267 MW in 5 minutes (279 → 13 MW)

CAMMESA, generation by SADI Total technology, readings at 1:55 p.m. and 2:00 p.m.

SADI demand 2.1% higher than expected (18,016 MW vs. 17,653 MW)

CAMMESA, actual SADI demand versus projected demand, reading at 12:00 p.m. Temperature 17 °C.

Sizewell B, Unit 2: Returns to Service After 71 MW Reduction · Maintenance

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148229 rev. 1 (Active), published 2026-09-01 12:51 UTC. BM Unit T_SIZB-2, participant BEGL001. Unplanned · Maintenance: "52650: De-load for maintenance activities". Window: September 3, 2026, 08:00 UTC → September 3, 2026, 14:00 UTC. Normal capacity: 630 MW; available: 559 MW.

Bruce Power Made-in-Canada Council to host Domestic Supply Chain Summit with the aim of creating opportunities for Canadian businesses and workers

Bruce Power · Newsroom · Bruce Power’s Made-in-Canada Council will host a Domestic Supply Chain Summit to forge relationships and commit to strengthening the domestic supply chain, supporting economic growth, and creating opportunities for Canadian businesses across multiple sectors. The Domestic Supply Chain Summit will bring together key suppliers, manufacturers, ... Read more The post Bruce Power Made-in-Canada Co…

Browns Ferry 2 increased its power output from 79% to 100%

Hartlepool, Reactor 1: Extended outage of 10 days (now scheduled to resume on September 11, 2026) · maintenance

Elexon BMRS REMIT, 48X000000000022A-ELXP-RMT-00148176 rev. 39 → 58. The return was postponed by 10 days, from 2026-09-01 01:30 UTC to 2026-09-11 06:30 UTC. 620 MW unavailable. Published September 3, 2026, at 09:58 UTC.

Imported generation fell by 282 MW in 5 minutes (350 → 68 MW)

CAMMESA, SADI total generation by technology, readings at 6:30 and 6:35.

Thermal power generation increased by 325 MW in 5 minutes (5,802 → 6,127 MW)

CAMMESA, generation by SADI Total technology, readings at 6:30 and 6:35.

Heysham 2, Reactor 8: scheduled shutdown, 660 MW unavailable · refueling · since September 4

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00147870 rev. 8 (Active), published September 3, 2026, at 09:16 UTC. BM Unit T_HEYM28, participant BEGL001. Planned · OPR: "48341: Offload Power Refueling". Window: September 4, 2026, 06:30 UTC → November 24, 2026, 22:00 UTC. Normal capacity: 660 MW; available capacity: 0 MW.

Sharp drop of 856 MW in French nuclear generation in 15 minutes (7:30 a.m. Paris time)

RTE eCO2mix, domestic nuclear generation: 38,758 MW at 7:15 a.m. and 37,902 MW at 7:30 a.m. Paris time; the previous hour had seen a change of -41 MW. It covered 89% of demand and fell to 87% (consumption 43,648 MW).

Imported generation increased by 346 MW in 5 minutes (538 → 884 MW)

CAMMESA, generation by SADI Total technology, readings at 1:10 a.m. and 1:15 a.m.

SADI demand 3.7% below forecast (14,443 MW vs. 15,000 MW)

CAMMESA, actual SADI demand versus forecast demand, reading at 1:00 a.m. Temperature 17.3 °C.

Hydropower generation fell by 257 MW in 5 minutes (5,759 → 5,502 MW)

CAMMESA, generation by SADI Total technology, readings at 8:40 p.m. and 8:45 p.m.

SADI demand 3.3% higher than expected (17,737 MW vs. 17,177 MW)

CAMMESA, actual SADI demand versus projected demand, reading at 7:00 p.m. Temperature 21.5 °C.

Hydropower generation increased by 300 MW in 5 minutes (4,994 → 5,294 MW)

CAMMESA, generation by SADI Total technology, readings at 6:50 p.m. and 6:55 p.m.

Imported generation rose by 480 MW in 5 minutes (436 → 916 MW)

CAMMESA, SADI generation by Total technology, readings at 6:45 p.m. and 6:50 p.m.

Hydropower generation increased by 509 MW in 5 minutes (4,096 → 4,606 MW)

CAMMESA, electricity generation by SADI Total technology, readings at 6:10 p.m. and 6:15 p.m.

Imported generation fell by 506 MW in 5 minutes (953 → 447 MW)

CAMMESA, generation by SADI Total technology, readings at 6:10 p.m. and 6:15 p.m.

Imported generation increased by 374 MW in 5 minutes (12 → 386 MW)

CAMMESA, generation by SADI Total technology, readings at 5:05 p.m. and 5:10 p.m.

Hydropower generation fell by 275 MW in 5 minutes (4,037 → 3,762 MW)

CAMMESA, generation by SADI Total technology, readings at 4:25 p.m. and 4:30 p.m.

Imported generation increased by 315 MW in 5 minutes (12 → 327 MW)

CAMMESA, generation by SADI Total technology, readings at 4:25 p.m. and 4:30 p.m.

Hydropower generation increased by 317 MW in 5 minutes (3,637 → 3,954 MW)

CAMMESA, generation by SADI Total technology, readings at 4:10 p.m. and 4:15 p.m.

SADI demand 2.0% higher than expected (17,725 MW vs. 17,375 MW)

CAMMESA, actual demand from the SADI total versus projected demand, reading at 12:00. Temperature 19 °C.

Heysham 2, Reactor 7: Returns to Service After a 660-MW Shutdown for Maintenance

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148191 rev. 50 (Active), published September 1, 2026, at 14:05 UTC. BM Unit T_HEYM27, participant BEGL001. Unplanned · Maintenance: "52340: De-load for maintenance activities". Window 2026-06-16 23:00 UTC → 2026-09-02 12:30 UTC. Normal capacity 660 MW, available 0 MW.

Renewable generation increased by 206 MW in 5 minutes (3,390 → 3,596 MW)

CAMMESA, generation by SADI Total technology, readings at 8:50 and 8:55.

Hydropower generation fell by 296 MW in 5 minutes (4,209 → 3,913 MW)

CAMMESA, electricity generation by SADI Total technology, readings at 8:30 and 8:35.

Browns Ferry 2 increased its output from 40% to 79%

Vogtle 4 increased its power output from 54% to 84%

Hydropower generation rose by 280 MW in 5 minutes (4,151 → 4,431 MW)

CAMMESA, generation by Total technology from the SADI, readings at 6:10 and 6:15.

Hydropower generation increased by 261 MW in 5 minutes (3,891 → 4,151 MW)

CAMMESA, SADI total generation by technology, readings at 6:05 and 6:10.

Imported generation fell by 297 MW in 5 minutes (458 → 161 MW)

CAMMESA, generation by SADI Total technology, readings at 6:05 and 6:10.

Hydropower generation increased by 274 MW in 5 minutes (3,617 → 3,891 MW)

CAMMESA, generation by SADI Total technology, readings at 6:00 a.m. and 6:05 a.m.

Heysham 1, Reactor 1: Extended outage of 26 days (now scheduled to resume operations on September 27, 2026) · operational reasons

Elexon BMRS REMIT, 48X000000000022A-ELXP-RMT-00148107 rev. 104 → 105. The return was postponed by 26 days, from 2026-09-02 04:00 UTC to 2026-09-27 22:00 UTC. 610 MW unavailable. Published September 2, 2026, at 08:24 UTC.

Heysham 1, Reactor 1: Early end to the 610 MW outage (REMIT message withdrawn)

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148225 rev. 4 (Dismissed), published September 2, 2026, at 08:24 UTC. BM Unit T_HEYM11, participant BEGL001. Planned · OPR: "52592: Offload Power Refueling". Window: September 2, 2026, 04:00 UTC → September 27, 2026, 22:00 UTC. Normal capacity: 610 MW; available: 0 MW.

Hartlepool, Reactor 2: Scheduled outage, 620 MW unavailable · refueling · since September 14

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148155 rev. 9 (Active), published September 2, 2026, at 07:44 UTC. BM Unit T_HRTL-2, participant BEGL001. Planned · OPR: "51923: Offload Power Refueling". Window: September 14, 2026, 02:00 UTC → October 4, 2026, 12:00 UTC. Normal capacity: 620 MW; available: 0 MW.

Hartlepool, Reactor 2: Extended outage of 7 days (now scheduled to resume operation on October 4, 2026) · refueling

Elexon BMRS REMIT, 48X000000000022A-ELXP-RMT-00148155 rev. 6 → 9. The return was postponed by 7 days, from 2026-09-27 10:00 UTC to 2026-10-04 12:00 UTC. 620 MW unavailable. Published September 2, 2026, at 07:44 UTC.

Heysham 1, Reactor 1: Scheduled outage, 610 MW unavailable · Fuel reloading

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148225 rev. 4 (Dismissed), published September 2, 2026, at 08:24 UTC. BM Unit T_HEYM11, participant BEGL001. Planned · OPR: "52592: Offload Power Refueling". Window: September 2, 2026, 04:00 UTC → September 27, 2026, 22:00 UTC. Normal capacity: 610 MW; available: 0 MW.

Thermal power generation fell by 267 MW in 5 minutes (6,949 → 6,682 MW)

CAMMESA, generation using Total’s SADI technology, readings at 00:35 and 00:40.

Hartlepool, Reactor 2: Extended outage of 7 days (now scheduled to resume operations on September 14, 2026) · operational reasons

Elexon BMRS REMIT, 48X000000000022A-ELXP-RMT-00148199 rev. 5 → 6. The return was postponed by 7 days, from 2026-09-07 01:00 UTC to 2026-09-14 02:00 UTC. 240 MW unavailable. Published September 1, 2026, at 21:35 UTC.

M4.6 Earthquake 73 km from Higashidori (Tohoku)

M 4.6 - 78 km ENE of Mutsu, Japan. Depth: 74 km. Nearest power plant: Higashidori (Tohoku) (Japan).

Sizewell B, Unit 2: unscheduled power reduction of 71 MW (11% of 630 MW) · maintenance · since September 3

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148229 rev. 1 (Active), published September 1, 2026, at 12:51 UTC. BM Unit T_SIZB-2, participant BEGL001. Unplanned · Maintenance: "52650: De-load for maintenance activities". Window: September 3, 2026, 08:00 UTC → September 3, 2026, 14:00 UTC. Normal capacity 630 MW, available 559 MW.

Atucha II, the country’s most powerful plant

Nucleoeléctrica Argentina · News · With 745 MW, Atucha II is the plant with the highest capacity...

Paluel 3: Reconnection to the power grid

EDF, 01/09/2026: «Actualité de l’unité de production n°3». Etiquetas: Production. Le 31 août, à 22h10, l’unité de production n°3 de la centrale nucléaire de Paluel a été reconnectée, en toute sûreté, au réseau électrique national. Elle avait été mise à l’arrêt le 23 août dernier par les équipes de la centrale pour intervenir sur un composant du circuit primaire, situé dans la partie nucléaire des installations. Les u…

Blayais 2: Automatic reactor shutdown

EDF, 01/09/2026: «Actualité de l'unité de production n°2 de la centrale du Blayais». Etiquetas: Production. Mardi 1 er septembre à 10h05, l’unité de production n°2 de la centrale nucléaire du Blayais s’est arrêtée automatiquement*, conformément aux dispositifs de sûreté et de protection du réacteur, à la suite du dysfonctionnement d’un tableau électrique lors de la réalisation d’un test de fonctionnement de l’un des …

Browns Ferry 2 returned to service (0% → 40%)

Vogtle 4 reduced output from 100% to 54%

Sharp drop of 1,010 MW in French nuclear generation in 15 minutes (10:15 a.m. Paris time)

RTE eCO2mix, domestic nuclear generation: 38,021 MW at 10:00 and 37,011 MW at 10:15 Paris time; the previous hour had seen a change of +39 MW. It covered 83% of demand and fell to 80% (consumption 46,007 MW).

Atucha I: The History of Latin America’s First Nuclear Power Plant

Nucleoeléctrica Argentina · News · Construction began in 1968 and in...

Braidwood: PART 21 - BREAKERS NOT CLOSING

PART 21 - BREAKERS NOT CLOSING The following is a summary of information provided by Westinghouse Electric Company, LLC, via email: Westinghouse has identified motor cutoff switches that were manufactured with an incorrect coating applied to the internal springs. The springs were specified to be colored with dye for identification during manufacturing. Contrary to this requirement, some springs were colored using acr…

Monticello increased its output from 56% to 100%

M4.5 Earthquake 139 km from Higashidori (Tohoku)

M 4.5—18 km southwest of Urakawa, Japan. Depth: 64 km. Nearest power plant: Higashidori (Tohoku) (Japan).

Sizewell B, Turbine 2: Returns to Service After 67 MW Reduction · Maintenance

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148228 rev. 2 (Active), published August 29, 2026, at 15:42 UTC. BM Unit T_SIZB-2, participant BEGL001. Unplanned · Maintenance: "52639: De-load for maintenance activities". Window: August 28, 2026, 19:00 UTC → August 29, 2026, 17:30 UTC. Normal capacity 630 MW, available 563 MW.

M4.7 Earthquake 77 km from Tokai

M 4.7 - 16 km ENE of Hasaki, Japan. Depth: 35 km. Nearest power plant: Tokai (Japan).

Blayais 1: scheduled outage

EDF, August 29, 2026: “Unit 1 shut down for scheduled maintenance.” Tags: Maintenance.

Monticello increased its output from 20% to 56%

M4.7 Earthquake 95 km from Humboldt Bay

M 4.7—85 km west of Petrolia, CA. Depth: 10 km. Nearest power plant: Humboldt Bay (United States).

Sizewell B, Unit 2: unscheduled power reduction of 67 MW (11% of 630 MW) · maintenance

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148228 rev. 2 (Active), published August 29, 2026, at 15:42 UTC. BM Unit T_SIZB-2, participant BEGL001. Unplanned · Maintenance: "52639: De-load for maintenance activities". Window: August 28, 2026, 7:00 PM UTC → August 29, 2026, 5:30 PM UTC. Normal capacity 630 MW, available 563 MW.

Saint Lucie U1/2: FITNESS FOR DUTY

FITNESS FOR DUTY The following information was provided by the licensee via phone and email: "On August 28, 2026, at 0942 EDT, it was determined that a contract non-licensed supervisor failed a test specified by the fitness-for-duty testing program. "This event is being reported pursuant to 10 CFR 26.719(b). "The NRC Resident Inspector has been notified." Part 21

Palo Verde U1/2/3: FITNESS FOR DUTY

FITNESS FOR DUTY The following information was provided by the licensee via phone and email: "On August 28, 2026, at 0842 MST, it was determined that a licensed operator supervisor failed a test specified by the fitness-for-duty testing program. "The individual's unescorted access authorization has been terminated. "The Palo Verde NRC Resident Inspector has been notified." Return to top Home News Releases …

Cattenom 2: reconnection to the power grid

EDF, August 28, 2026: “Generation Unit No. 2 Reconnected to the Power Grid.” Tags: Production.

Monticello returned to service (0% → 20%)

AAF International: PART 21 - ASME CODE CERTIFICATION PROCESS NOT FOLLOWED

PART 21 - ASME CODE CERTIFICATION PROCESS NOT FOLLOWED The following is a summary of information provided by AAF via phone and email: AAF sells filters containing acid-resistant media that is certified for compliance with a number of ASME AG1 sections. Compliance with these ASME sections requires that the media is qualified by a third-party laboratory every five years. AAF made the decision to not requalify acid res…