Darlington
Newcastle Township, ON·CANDU
Reactor Data
Reactor Units
Every power reactor at this site as listed in the IAEA Power Reactor Information System (PRIS): reactor type and model, net electrical capacity, grid connection and commercial operation dates, and current status.
5 units: 4 operational, 1 under construction.
Net capacity in service: 3,512 MWe.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Darlington 2 | PHWR | CANDU 850 | 878 | 1981-09-01 | 1990-01-15 | 1990-10-09 | Operational | |
| Darlington 1 | PHWR | CANDU 850 | 878 | 1982-04-01 | 1990-12-19 | 1992-11-14 | Operational | |
| Darlington 3 | PHWR | CANDU 850 | 878 | 1984-09-01 | 1992-12-07 | 1993-02-14 | Operational | |
| Darlington 4 | PHWR | CANDU 850 | 878 | 1985-07-01 | 1993-04-17 | 1993-06-14 | Operational | |
| Darlington SMR1 | BWR | BWRX | 300 | 2026-04-22 | Under Construction |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Darlington 2 | 881 | 934 | 2,776 | 1989-11-05 | ONTARIO HYDRO / ATOMIC ENERGY OF CANADA, LTD. | BROWN BOVERI ET CIE | |
| Darlington 1 | 881 | 934 | 2,776 | 1990-10-29 | ONTARIO HYDRO / ATOMIC ENERGY OF CANADA, LTD. | BROWN BOVERI ET CIE | |
| Darlington 3 | 881 | 934 | 2,776 | 1992-11-09 | ONTARIO HYDRO / ATOMIC ENERGY OF CANADA, LTD. | BROWN BOVERI ET CIE | |
| Darlington 4 | 881 | 934 | 2,776 | 1993-03-13 | ONTARIO HYDRO / ATOMIC ENERGY OF CANADA, LTD. | BROWN BOVERI ET CIE | |
| Darlington SMR1 | 300 | 300 | 870 | GE Vernova | Not Available |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Darlington 2 | 198.4 TWh | 72.5% | 72.7% | 76.0% |
| Darlington 1 | 203.6 TWh | 77.9% | 78.1% | 81.6% |
| Darlington 3 | 200.5 TWh | 79.0% | 79.1% | 81.8% |
| Darlington 4 | 200.3 TWh | 79.6% | 79.6% | 81.8% |
Operator: Ontario Power Generation
Owner: Ontario Power Generation
Source: IAEA Power Reactor Information System (PRIS), as of 2026-11-02.
Fuel Cycle Facilities
Fuel cycle plants at this site, as listed in the IAEA Nuclear Fuel Cycle Facilities Database: what each plant does, its scale and design capacity, the years it operated, its current status and who operates it.
1 facility: 1 in operation.
| Facility | Type | Scale | Design Capacity | Operated | Status | Operator |
|---|---|---|---|---|---|---|
| Darlington Waste Management Facility | AFR Dry Spent Fuel Storage | Commercial | 1000 Cask-Bund. | 2008– | In Operation | Ontario Power Generation |
Source: IAEA Nuclear Fuel Cycle Facilities Database (NFCFDB), as of 2026-10-13.
Working Here
Jobs at Darlington 1 active
Active job listings posted for this specific facility on the NukeWorker job board. Click a job title for details, or the header to see them all.
Per Diem Rates FY 2026
Per diem covers lodging and meals & incidental expenses (M&IE) for government and contractor travel near this facility. Rates are from the U.S. State Department foreign per diem tables for FY 2026.
$167
Lodging/Night
$120
M&IE/Day
$287
Total/Day
Canada: rate for locations the State Department does not list separately
U.S. Department of State foreign per diem, for U.S. government and contractor travel.
Photos
Photos of this facility from the NukeWorker photo gallery. Click the header or any photo to browse the full album.
Facility Map
Interactive satellite map showing the facility's geographic location. Marker color indicates current status: green for online, red for offline, orange for reduced power. Click the header to open in Google Maps satellite view.
43.8695, -78.723
Location & Contact
Physical address, phone number, and website for this facility. Use the directions link to get driving directions via Google Maps.
NukeWorker Member Ratings 7 votes
Community ratings from NukeWorker members. Vote to share your experience working at this facility. Score uses a Bayesian average that accounts for vote count — facilities with few votes are pulled toward the fleet average, so rankings reflect confidence, not just raw percentages.
Above Average
4 (57%)
Average
2 (28%)
Below Average
1 (14%)
Plant Facts
About This Site
Written by NukeWorker from public records: facts that do not change. Operator, status and capacity come from the live data elsewhere on this page. Sources: Wikipedia: Darlington Nuclear Generating Station.
Darlington is a nuclear power station on the north shore of Lake Ontario at Bowmanville, in the municipality of Clarington, Durham Region, Ontario.
Read more
Ontario Hydro planned and built the station, with four CANDU pressurized heavy-water reactors supplied by AECL. Construction began on Unit 2 on 1 September 1981, Unit 1 on 1 April 1982, Unit 3 on 1 September 1984 and Unit 4 on 1 July 1985. The units were connected to the grid on 15 January 1990 (Unit 2), 19 December 1990 (Unit 1), 7 December 1992 (Unit 3) and 17 April 1993 (Unit 4). The project suffered long delays and a reported final cost of about C$14.4 billion.
Technical Specs
Reactor design specifications including type (PWR/BWR), containment design, nuclear steam supply system manufacturer, thermal and electrical power ratings, and current operational status.
Reactor Type:
CANDU