According to data released by the International Atomic Energy Agency (IAEA), by 2004, the world **** 30 countries have nuclear power plants, a total of 442, their total power generation accounted for 16% of the world's total power generation. The five countries with the largest number of nuclear power plants are the United States (104), France (59), Japan (54), Russia (30) and the United Kingdom (27). Exceptionally, five countries rely heavily on nuclear power plants for their electricity supply: Lithuania (80%), France (76%), Slovakia (57%), Belgium (55%) and Sweden (50%). Currently there are 27 nuclear power plants under construction in the world ***, most of which - 18 - are located in Asia According to data released by the International Atomic Energy Agency, the United States is the world's largest nuclear power plant in the country, with 104, nuclear power accounted for 19% of the country's total generating capacity. The proportion of nuclear power to the country's total power generation is 19%