China plans to increase its installed capacity of nuclear power to 40 million kw by the year 2020, accounting for 4 percent of the country’s total installed capacity at that time, a senior government official said here Tuesday. China’s current installed nuclear power capacity takes up less than 2 percent of the total installed power generation capacity, compared with the world average of 17 percent, said Zhang Guobao, deputy director of the State Development and Reform Commission.