AtkinsRéalis (Candu Energy)
AtkinsRéalis (Candu Energy) is the nuclear steam supply system vendor for 39 reactor units on record, 25 of them operating, totalling 18.9 GW of gross capacity across 5 countries.
Owner of the CANDU pressurised heavy water reactor line, acquired from Atomic Energy of Canada Limited in 2011. CANDU runs on natural uranium and refuels on load, which removes enrichment from its fuel chain entirely. Current product is the CANDU MONARK.
| Headquarters | Montreal, Canada |
|---|---|
| Founded | not recorded |
| Ownership | listed |
| Listing | TSX: ATRL |
| Roles in the chain | vendor |
| Canada | 17 |
|---|---|
| South Korea | 3 |
| Romania | 2 |
| China | 2 |
| Argentina | 1 |
AtkinsRéalis (Candu Energy) in context
AtkinsRéalis (Candu Energy) is the reactor vendor for 25 of the 419 operating units on record (6.0%), 6th of 13 vendors by operating units, 18,880 MW gross in total.
The median age of its operating units is 40.0 years, against 39.0 for the whole operating fleet.
Its 34 finished units with construction and grid dates took a median 6.5 years to build, against 6.0 across all finished reactors.
AtkinsRéalis (Candu Energy) is the vendor of 5 reactor design lines (CANDU 6, CANDU 750A, CANDU 750B and CANDU 500B and 1 more), covering 30 units on record, 25 of them operating.
How these are worked out: shares and ranks use the world totals cited in the table, and only named companies are ranked (unnamed or country-level entries in a source are not). A facility with no stated capacity is counted as a facility but adds nothing to a capacity figure. Vendor figures count operating units where this company is the recorded reactor vendor; ages count from the start-up year on record, and build times run from construction start to grid connection, as on the age and build-times pages.
Design lines
| Design | Generation | Capacity | Operating | Units |
|---|---|---|---|---|
| CANDU 6 | II | 600–750 MWe gross | 9 | 14 |
| CANDU 750A | II | 830–870 MWe gross | 4 | 4 |
| CANDU 750B | II | 870–890 MWe gross | 4 | 4 |
| CANDU 500B | II | 520–560 MWe gross | 4 | 4 |
| CANDU 850 | II | 930–940 MWe gross | 4 | 4 |
Installed base
| Unit | Country | Status | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Darlington nuclear power plant 1 | Canada | CANDU 850 | 934 | 1992 | |
| Darlington nuclear power plant 2 | Canada | CANDU 850 | 934 | 1990 | |
| Darlington nuclear power plant 3 | Canada | CANDU 850 | 934 | 1993 | |
| Darlington nuclear power plant 4 | Canada | CANDU 850 | 934 | 1993 | |
| Bruce nuclear power plant B6 | Canada | CANDU 750B | 891 | 1984 | |
| Bruce nuclear power plant B5 | Canada | CANDU 750B | 872 | 1985 | |
| Bruce nuclear power plant B7 | Canada | CANDU 750B | 872 | 1986 | |
| Bruce nuclear power plant B8 | Canada | CANDU 750B | 872 | 1987 | |
| Bruce nuclear power plant A1 | Canada | CANDU 791 | 868 | 1977 | |
| Bruce nuclear power plant A4 | Canada | CANDU 750A | 868 | 1979 | |
| Bruce nuclear power plant A3 | Canada | CANDU 750A | 865 | 1978 | |
| Bruce nuclear power plant A2 | Canada | CANDU 791 | 836 | 1977 | |
| Qinshan nuclear power plant 3-1 | China | CANDU 6 | 728 | 2002 | |
| Qinshan nuclear power plant 3-2 | China | CANDU 6 | 728 | 2003 | |
| Cernavodă nuclear power plant 1 | Romania | CANDU 6 | 706 | 1996 | |
| Point Lepreau nuclear power plant 1 | Canada | CANDU 6 | 705 | 1983 | |
| Cernavodă nuclear power plant 2 | Romania | CANDU 6 | 705 | 2007 | |
| Embalse nuclear power plant | Argentina | CANDU 6 | 656 | 1984 | |
| Wolsong nuclear power plant 3 | South Korea | CANDU 6 | 624 | 1998 | |
| Wolsong nuclear power plant 2 | South Korea | CANDU 6 | 599 | 1997 | |
| Wolsong nuclear power plant 4 | South Korea | CANDU 6 | 589 | 1999 | |
| Pickering nuclear power plant B5 | Canada | CANDU 500B | 540 | 1983 | |
| Pickering nuclear power plant B6 | Canada | CANDU 500B | 540 | 1984 | |
| Pickering nuclear power plant B7 | Canada | CANDU 500B | 540 | 1985 | |
| Pickering nuclear power plant B8 | Canada | CANDU 500B | 540 | 1986 | |
| Sellafield (Candu) nuclear power plant 1 | United Kingdom | Cancelled | CANDU | 740 | - |
| Sellafield (Candu) nuclear power plant 2 | United Kingdom | Cancelled | CANDU | 740 | - |
| Cernavodă nuclear power plant 3 | Romania | Pre-construction | CANDU 6 | 720 | 2031 |
| Cernavodă nuclear power plant 4 | Romania | Pre-construction | CANDU 6 | 720 | 2032 |
| Cernavodă nuclear power plant 5 | Romania | Cancelled | CANDU 6 | 706 | - |
| Wolsong nuclear power plant 1 | South Korea | Retired | CANDU 6 | 683 | 1983 |
| Gentilly nuclear power plant 2 | Canada | Retired | CANDU 6 | 675 | 1983 |
| Pickering nuclear power plant A1 | Canada | Retired | CANDU 500A | 542 | 1971 |
| Pickering nuclear power plant A2 | Canada | Retired | CANDU 500A | 542 | 1971 |
| Pickering nuclear power plant A3 | Canada | Retired | CANDU 500A | 542 | 1972 |
| Pickering nuclear power plant A4 | Canada | Retired | CANDU 500A | 542 | 1973 |
| Douglas Point (AECL) nuclear power plant | Canada | Retired | CANDU 200 | 218 | 1968 |
| Karachi nuclear power plant 1 | Pakistan | Retired | CANDU-137 MW | 100 | 1972 |
| Nuclear Power Demonstration (NPD) nuclear power plant | Canada | Retired | CANDU | 25 | 1962 |
Sources
- AtkinsRéalis (Candu Energy), company source
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data