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Summer is the busy season for the Dayawan nuclear power plant, located on the scenic Daya Bay in the south China city of Shenzhen. Not only is there a peak demand for electricity, but the typhoon season also means the plant must be ready to handle any emergency.

Clean electricity: Pictured is Phase 1 of the Ling'ao power plant, which has two nuclear reactors that came into commercial operation respectively in 2002 and 2003.[Photo/Beijing Review]

On the night of June 30, the day before tropical storm Rumbia reached the South China sea, about 350 km southwest of Shenzhen, Dayawan's emergency response system kicked in to prevent its nuclear facilities from being damaged. Neither the plant nor its personnel were harmed.

"As long as there are potential threats, we'll utilize our emergency response system to keep our nuclear power plants safe," said Zhao Fuming, associate chief safety engineer of Dayawan Nuclear Power Operation and Management Co. The Dayawan plant has successfully fended off six typhoons since going into operation in 1994.

Japan's Fukushima nuclear accident in March 2011, which brought China's once thriving nuclear power industry to a grinding halt, has spurred a rise in the level of nuclear safety and emergency response in China.

China relaunched its nuclear power projects in October 2012, requiring that all new nuclear power plants meet the world's highest safety standard.

Drawing on the global response to nuclear accidents, especially the Fukushima accident, China's nuclear authority has also revised its national nuclear emergency plan from its 2005 edition.

The plan, approved by the State Council and released on June 30, specifies how national and provincial authorities and nuclear power operators should respond to nuclear emergencies and requires accurate information be published in a timely and transparent manner in the event of an incident or accident, according to the National Nuclear Emergency Response Office. The plan also expands emergency response to accidents that may happen during the transportation of spent nuclear fuel or aerospace vehicles equipped with nuclear devices.

"Nuclear safety is the lifeline of the nuclear power industry and the emergency response system is the last firewall to ensure safety," said Ma Xingrui, Vice Minister of Industry and Information Technology and Chairman of China Atomic Energy Authority (CAEA).

The basic tasks of nuclear emergency response are to effectively deal with possible accidents, to control, mitigate and eliminate human harm and property loss, and to protect public and environmental safety, said Ma.

Currently, China has 17 nuclear power generating units in operation, with a combined capacity of 14.76 million kilowatts (kw), nine of which are operated by China National Nuclear Corp. (CNNC) and eight by China General Nuclear Power Corp. (CGN). Another 28 nuclear generating units are under construction, with a total capacity of 28.3 million kw.

So far, China's nuclear safety record is clean, with no incidents or accidents above level 2 of the International Nuclear and Radiological Event Scale (INES) having taken place. There are seven levels on the INES scale: three incident levels (1-3) and four accident levels (4-7). Events without safety significance are called "deviations" and are classified below level 0. The Fukushima accident has been rated level 7.

"But we should be 100-percent prepared for the one-millionth-of-1-percent possibility [of nuclear accidents]," said Xu Ping, Deputy Director of the Department of Nuclear Emergency and Safety Regulation at CAEA.

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