On the 30th of August 1996 at the CHOOZ power station in the Ardennes, the first 1500 MW turbine started up under nuclear steam and connected to the grid. It reached full power in the spring of 1997, followed shortly afterwards by a second identical machine. This turbine, known as ARABELLE, is currently the most powerful in the world, with a single line rotating at 1500 rpm. It has been entirely designed, manufactured and installed by the teams of GEC ALSTHOM, within the framework of the Electricite de France N4 PWR programme. It represents a new type of nuclear turbine, the fruit of much research and development work, which started in the 1980s. The main characteristics and design features of ARABELLE are described in this paper.
Lamarque, F 
- Steam Turbine Group, GEC AIsthom Power Generation, Newbold Road, Rugby, Warwickshire CV2I 2NH (United Kingdom)