[en] The much lower pressures and temperatures associated with water cooled reactors led to the development of designs of steam turbine which differ markedly from the fossil fired units which at that time had undergone continuous development for more than seventy years. Gas-cooled reactors produce steam conditions which are much closer to those of conventional, fossil-fired, steam plant: indeed, they have increased to the point where on the advanced gas-cooled reactors (AGR) now in service in the United Kingdom, they are virtually identical. This article discusses the design of steam turbines and associated equipment for water cooled reactors, where the steam is supplied at moderate pressure and is either saturated or, exceptionally, has a small degree of superheat. The only significant difference is that on the AGR the reactor demands a much lower final feed temperature and this eliminates the need for high pressure feed heaters. (5 figures, 2 tables). (Author)