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Gentilly Nuclear Generating Station (or Centrale nucl√©aire de Gentilly in French) is a Canadianmarker nuclear power station located near B√©cancourmarker, Quebecmarker. The facility derives its name from the Gentilly suburb of the city of B√©cancour, in which it is located. It is around 100 km north east of Montreal.

The Gentilly site contains the only power reactors in Quebec (there is also a SLOWPOKE reactor at the Ecole Polytechniquemarker) and comprises two nuclear reactors (one CANDU-BWR prototype, now decommissioned, and one CANDU) located on the south shore of the St. Lawrence Rivermarker. The facility was constructed in stages between 1966‚Äď1983 by the provincial Crown corporation, Hydro-Qu√©bec. Gentilly-1 is closed and in the decommissioning process, while Gentilly-2 is currently in operation.


Gentilly-1 was a prototype CANDU-BWR reactor, based on the SGHWR design. It was designed for a net output of 250MW(e). The reactor had several features unique amongst CANDU reactors, including vertically-oriented pressure tubes (allowing for the use of a single fuelling machine below the core), and light-water coolant. These features were intended to reduce the cost and complexity of the unit, again to make it an attractive export unit. However, the design was not successful, and over nearly 7 years recorded only 180 on-power days. Gentilly-1 is no longer in operation.


Gentilly-2 is a standard CANDU 6 reactor, similar to the Point Lepreau Nuclear Generating Stationmarker. The CANDU 6 is a successful reactor type, and has been exported to South Koreamarker, Argentinamarker, Romaniamarker and Chinamarker. The plant has a net output of 675MW(e). Unlike the adjacent Gentilly-1 reactor, Gentilly-2 has had an good service record since start-up in 1982, with a cumulative operating factor of 80.52%, and is due to shut down for refurbishment sometime around 2011.

On August 19, 2008, Quebec announced that it will spend $1.9B to overhaul Gentilly-2 that should extend its lifespan to 2040.

The G-2 site also houses a 500MW gas turbine generation plant.

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