The Bugey Nuclear Power Station is located in Bugey in the Saint-Vulbas commune (Ain), about 30 km from the Swiss border. The site occupies 100 hectares. It is on the edge of the Rhône River, from where it gets its cooling water, and is about 30 km upstream from Lyon. About 1,200 people work at the site.
The site houses 4 currently operating units, all being pressurized water reactors. The 5th reactor (unit 1) is currently being dismantled. It was the last UNGG reactor built in the World.Some of the cooling comes from direct use of the Rhône water (units 2 and 3) while some is done by the use of cooling towers (units 4 and 5).According to reports from the Autorité de sûreté nucléaire, some safety functions may not be provided in the event of an earthquake. The area is not known for its seismic activity.