Pickering Nuclear Power Plant is a Canadian nuclear power station located on the north shore of Lake Ontario in Pickering, Ontario. The facility derives its name from the City (originally Township) of Pickering in which it is located.

Also co-located at the Pickering station is a single 1.8 MWe wind turbine named the OPG 7 commemorative turbine. In 1994 Pickering Unit 7 set a world record for continuous operation (894 days) without a shutdown.

The reactors are as follows:

PICKERING A

• PICKERING A 1
• PICKERING A 2 (Dormant)
• PICKERING A 3 (Dormant)
• PICKERING A 4

PICKERING B

• PICKERING B 5
• PICKERING B 6
• PICKERING B 7
• PICKERING B 8

The Pickering Nuclear Power Plant facility was constructed in stages between 1966-1986 by the provincial Crown corporation, Ontario Hydro. In April 1999 Ontario Hydro was split into 5 component Crown corporations with Ontario Power Generation (OPG) taking over all electrical generating stations and which continues to operate the Pickering station.

The Pickering Nuclear Power Plant is one of the largest nuclear facilities in the world and comprises 8 CANDU nuclear reactors located on the northern shore of Lake Ontario, having a total output of 4124 MW (capacity net) and 4336 MW (gross net) when all units are online. Pickering is only surpassed in Canada by the Bruce Nuclear Generating Station, which while also having 8 reactors, has a greater output. The facility is connected to the North American power grid via numerous 230,000 and 500,000 volt transmission lines.

The facility is operated as two distinct stations, Pickering A (Units 1 to 4) and Pickering B (Units 5 to 8). While primarily administrative in nature, the division is not wholly artificial, as there are some distinct differences in design between the two groups of stations. (Example: The Pickering A units employ moderator dump as a shutdown mechanism, a feature not found in Pickering B.) There are, however, a number of systems and structures in common between the two stations; the most notable of these is possibly the shared vacuum building, a negative pressure containment system.

Ontario Power Generation (OPG) announced a two-part investment strategy for its nuclear generating stations in Durham Region. This includes the decision to spend $300-million to keep the Pickering B nuclear station open for another decade before it begins the longer term decommissioning process as refurbishment for Pickering B station will not be pursued. The first step in this process is to layup the reactors and place them into safe storage. Pickering staff will have future opportunities placing the Pickering units in a safe storage state, at the Darlington refurbishment and operations, or at the potential new build at Darlington. OPG will proceed with a detailed planning phase for the mid-life refurbishment of the Darlington Nuclear Generating Station east of Toronto, with construction expected to start in about 2016. The business decision to move forward with an investment in Darlington comes after very positive outcomes of initial studies on the plant’s condition and continued strong operating performance. The next phase of the process will include an Environmental Assessment, an Integrated Safety Review and an Integrated Improvement Plan that will define the scope, cost and schedule of the refurbishment project.

Pickering Nuclear Power Station
A unit at the Pickering plant
Data
Country	Canada
Location	Pickering, Ontario
Owner	Ontario Power Generation (OPG)
Built	1966-1986
Reactors
Reactor type	CANDU
Reactors active	6 (3,100 MW)
Reactors shut down	2
Power
Status	Operating

Bruce Nuclear Generating Station is a Canadian nuclear power station located on the eastern shore of Lake Huron, in the communities of Inverhuron and Tiverton, Ontario. The facility derives its name from Bruce County in which it is located, in the former Bruce Township.

The facility was constructed in stages between 1970 and 1987 by the provincial Crown corporation, Ontario Hydro. In April 1999 Ontario Hydro was split into 5 component Crown corporations with Ontario Power Generation (OPG) taking over all electrical generating stations. In June 2000, OPG entered into a long term lease agreement with private sector consortium Bruce Power to take over operation of the Bruce station. In May 2001, Bruce Power began operations.

The Bruce station is the largest nuclear facility in North America, and second largest in the world (after Kashiwazaki-Kariwa in Japan), comprising 8 CANDU nuclear reactors having a total output of 6,232 MW (net) and 7,276 MW (gross) when all units are online. Current output with 6 of the 8 reactors on line is 4,640 MW. The Bruce station has two 500 kV transmission lines going out of it to feed the major load centres in southern Ontario, in addition to three 230 kV lines serving the local area.

The reactors are as follows:

BRUCE A
Bruce A

• BRUCE A 1 (being refurbished)
• BRUCE A 2 (being refurbished)
• BRUCE A 3
• BRUCE A 4

BRUCE B

• BRUCE B 5
• BRUCE B 6
• BRUCE B 7
• BRUCE B 8

In the autumn of 2005, Bruce Power and the Government of Ontario committed to return units 1 and 2 to service, in order to help meet increasing energy demand in the province of Ontario. The project was originally estimated to cost $4.25 billion.

In 2006 and 2007, the restart project was judged to be the largest infrastructure project in Canada by ReNew Canada magazine. Estimated cost for the project later grew to $5.25 billion when Bruce Power decided to replace all 480 fuel channels in Unit 4, which will extend its working life to 2036, in line with the other 3 units of Bruce A. In 2008, due to difficulties developing the necessary robotics, the estimated cost of restarting Units 1 and 2 was raised between $400 and $700 million. The project, however, remained on schedule.

As part of a plan submitted to the Ontario Energy Board for approval, the Ontario Power Authority recommended building a new nuclear power station consisting of at least two reactors. The leading candidate is AECL's Advanced CANDU Reactor. Environmental assessments are currently underway both at Bruce and at Ontario Power Generation's Darlington Nuclear Generating Station.

Encompassed by the Bruce site is the shut-down Douglas Point reactor, an earlier version of the CANDU design.