BEIJING, May 21-- China will have 30 million kilowatts (KW) of nuclear power capacity by the end of 2015, said Xu Yuming, deputy director of the China Nuclear Energy Association on Thursday.

Currently there are 23 nuclear power units operating in China, with a combined capacity of 21.4 million kilowatts. Twenty-nine units are being built or planned, Xu said.

The government plans to increase China's total nuclear power capacity to 58 million kilowatts by 2020, a rise of 170 percent over the current level.

Xu estimates that this will require 100 billion yuan (16.34 billion U.S. dollars) of investment every year.

It is expected that China's electricity usage will double by 2030, Xu said, adding efforts should be made to promote clean energy including nuclear power.

Last month, China approved the construction of pilot nuclear power units using the Hualong One technology, a domestically-developed third generation reactor design drawing on the world's leading design philosophy. The homegrown technology will help contribute to industrial upgrades and steady economic growth.