Douglas Point was the second CANDU PHWR built, after the successful Nuclear Power Demonstrator(NPD). It was a 220MWe single unit station, which has been shut down for some time and is no longer operable. It is adjacent to the Bruce Nuclear Generating Station, and is similar to the CANDU units sold to India and Pakistan. The CANDU reactor is a pressurized-heavy water, natural-uranium power reactor designed in the 1960s by a partnership between Atomic Energy of Canada Limited and the Hydro-Electric Power Commission of Ontario as well as several private industry participants. ... The Nuclear Power Demonstrator (or NPD) was the prototype CANDU reactor. ... Bruce Nuclear Generating Station is a Canadian nuclear power station located in Tiverton, Ontario. ...

Douglas Point went into service in 1968, and was run until 1984. It provided invaluable experience for both the construction and operation of the subsequent Pickering reactors. Uniquely among CANDUs, Douglas Point had an oil-filled window which allowed direct observation of the East reactor face, even during full-power operation.[1]

The timing of the construction of Douglas Point was somewhat controversial. Originally, the NPD reactor was to be a proof-of-concept unit and was to allow for operators to gain experience. However, the decision to construct Douglas Point was made before the NPD reactor was operational, thus negating this argument.[2]

The Douglas Point site was originally intended to be a 2-unit station, however, the success of the larger 515MWe units at Pickering made the Douglas Point type obselete and no further units were built.