The Tianwan nuclear power plant is seen on Tuesday in Lianyungang, East China's Jiangsu Province. In the first seven months of the year, power generation by the country's major industrial firms grew 13.2 percent year-on-year, official data showed Monday. In July alone, power generation rose 9.6 percent, while nuclear power generation jumped 14.4 percent. Photo: cnsphoto

The Tianwan Nuclear Power Plant in east China's Jiangsu Province, a joint nuclear energy project between China and Russia, reported a nuclear related incident in August, the second within a year. 

The incident was classified as a level zero event according to international standards, National Nuclear Safety Administration said on Wednesday, indicating that there is a deviation in the operation, but without any breaches of safety.

There is no overexposure to radioactive material or any potential environmental risk, the NNSA said.

The incident was reportedly caused by a false alarm taken from readings off  monitoring instruments.

At 7:46 am on August 27, the sixth unit of the nuclear power plant has sent an alarm over concerns of excessive radioactivity level. An on-site investigation showed that the radioactivity level measured at the scene was within the normal levels. All faulty monitoring instruments have been replaced.

The nuclear power plant has reported operation incidents in March 2021 and May 2020, both classified as level zero.