Photo: Daya Bay Nuclear Power Operations & Management Co., Ltd

In addition to prudent site selection, plant design and operational management, it is equally important to continuously monitor the radiation impact of a nuclear power station to the environment and minimise any such impact. Daya Bay has a comprehensive programme in place to monitor radiation impact during operation both within the site and in the surrounding environment.

While a nuclear power station is designed and operated with great care to isolate practically all its resulting radioactivity, a very minute quantity of radioactivity will be discharged in the form of gas or liquid. Such radioactivity discharges are very minute and will not have adverse impact to the environment. The power station has a comprehensive monitoring system in place to closely monitor such impact on the surrounding environment.

Radiation and Environmental Monitoring at Daya Bay

A number of environmental monitoring stations have been set up within 5km of the Daya Bay Nuclear Power Station to detect any abnormal changes in the radiation level.

Findings of a 25-year study by Shenzhen Municipal Health Bureau:
Daya Bay and Ling Ao Nuclear Power Stations do not have any negative health impact on nearby residents

Regulations in the Mainland require radioactivity releases from a nuclear power station to be strictly controlled. The annual radiation dose to the people in the vicinity of the nuclear power station should not exceed 0.25 mSv per person per annum. This limit is about one tenth of typical background radiation dose that Hong Kong resident receives in a year. The continuous monitoring results of Daya Bay shows that the radiation impact from the power station has been very minute and well within this stringent national limit over the years.