Darlington 3 is a 934MW nuclear reactor planned in Ontario, Canada. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the nuclear reactor is currently at the under rehabilitation & modernization stage. The construction on the reactor is likely to commence in Sep, 1984. The plant proponent is expected to achieve the first power from the reactor in Dec, 1992. Subsequent to the trial runs, the reactor is expected to enter into commercial operation in Feb, 1993. Buy the profile here.


Darlington 3 is a Generation II nuclear reactor being developed by Atomic Energy of Canada and Ontario Power Generation, are the main contractors for the project.

The 934MW reactor is currently owned and will be operated by Ontario Power Generation. The company has a stake of 100%.

Darlington 3 is a type of PHWR reactor. It will feature 6,240 fuel assemblies in the core of reactor, the place where fission occurs and energy is released. Safety contol rods that are used to control the fission rate in the reactor will be 32 in number.

Development status

The reactor construction is expected to commence from Sep, 1984. Subsequent to that it will enter commercial operation by Feb, 1993.

Contractors Involved

GE Power will be the steam turbine supplier for the nuclear reactor. The company is expected to provide 1 steam turbine for the project. Ontario Power Generation is expected to be the architect engineer for the reactor. The reactor system is likely to be supplied by Atomic Energy of Canada Ltd and MIL Vickers. The reactor vessel is expected to be supplied by MIL Vickers. The material used for the construction of the vessel will be Stainless Steel (ASME SA240 Type 304L). The civil works will be carried out by Ontario Power Generation.

For more details on Darlington 3, buy the profile here.

About Atomic Energy of Canada

Atomic Energy of Canada Ltd (AECL) is a Federal Crown corporation. It implements nuclear science and technology, and manages radioactive waste and decommissioning activities in Canada. The company delivers mandates through long-term contracts with the private sector for the management and operation of its sites. It receives federal funding to deliver its mandate and reports to the Parliament. The company oversees the delivery of the Federal Nuclear Science and Technology Work Plan to support the government’s priorities and responsibilities in various areas such as non-proliferation, energy, security, counter-terrorism, environmental protection, nuclear safety, health and emergency response. AECL is headquartered in Chalk River, Ontario, Canada.

About Ontario Power Generation

Ontario Power Generation Inc (OPG) is an electric utility. It generates and sells energy. The company produces power using hydro, nuclear, and thermal sources. OPG has long-term lease arrangement and related agreements with Bruce Power LP related to the Bruce nuclear generating stations. It also provides nuclear waste management, ancillary and detritiation services; dimensioning services for nuclear-generating stations and other facilities; and sells heavy water and isotopes. OPG trades electricity, financial energy, financial risk management energy products, and energy-related products with counterparties in Ontario and neighboring energy markets. The company is owned by the Province of Ontario. OPG is headquartered in Toronto, Ontario, Canada.


GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Power Intelligence Center, which provides detailed profiles of over 170,000 active, planned and under construction power plants worldwide from announcement through to operation across all technologies and countries worldwide.