[en] In some regions of the United States and Europe nuclear power supplies over 30 percent of the total electricity demand. It supplies 11 percent in developed western nations and about 2.4 percent of total world primary energy demand. The installed nuclear capacity in OECD countries, which accounts for 94 percent of world nuclear capacity, is currently expected to increase from the 113 GWin 1980 to 220 GW by 1985 and 330 GW by 1990. In addition to impediments to nuclear programmes that have arisen from a lack of public acceptance, procedural problems have arisen through uncertainties in the regulatory processes, particularly in the USA and West Germany