It was initially designed as a 200 MW reactor, fueled with natural uranium.
The 22 MW reactor generated Canada's first nuclear energy to the grid on June 4, 1962.
Plans are in place to construct two 1,000MW reactors, nearly doubling the Kingdom's electricity generation capacity, by 2022.
According to American Scientist, a reasonable cost projection is that 100 MW reactors could be factory produced for around $200 million.
The plant's single 75 MW reactor operated from 1963 to 1964.
The larger 6.5 MW reactor achieved criticality in 1959 and was shut down in 1984.
The 40 MW reactor used natural uranium fuel, while using heavy water as a moderator.
There are plans for an 800 MW reactor and there are two older reactors that have been decommissioned.
There is also a 15 MW reactor used for research and collaboration with several international partners.
Between 1968 and 1976, there were plans to develop four 250 MW reactors at the site.