The Working Group 0ffshore Nuclear Power Plants was established by the Commission of the European Communities in 1971. At that time it appeared that the option offered by creating new sites offshore should be explored. The present development of nuclear power has not, however, reached the stage where offs hore siting can be considered as a near or medium term proposition. The purpose of this report is to summarize the state of the art for the provision of floating or fixed structures, or man-made islands of the size needed for the construction of nuclear and other power stations. It describes...