HKNIC - Environmental Impact
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Environmental Impact
Regulation limits the amount of radiation that can be released from a nuclear power station in China. These limits are based on international criteria and those for the Daya Bay site, which in this case includes both the Guangdong Daya Bay Nuclear Power Station and the nearby Ling Ao Nuclear Power Station, are comparable to those for established utilities in developed countries. The Ministry of Environmental Protection requires that under normal operation nuclear power stations in one location should collectively produce a radiation dosage of no more than 0.25 millisieverts a year for a member of the public. This figure is below the regulatory limit of 5 millisieverts a year for the public from all artificial radiation sources. A conservative assessment indicates that even with radiological releases reaching their regulatory limits for the site, the most exposed member of the public would receive no more than 2.8% of the permitted radiation dose for the public.
Dosage of the most exposed local inhabitants as a percentage of their annual limits
  Liquid discharge Gaseous discharge
External exposure and inhalation   1.8%   0.6%
Foodstuff ingestion   1.0%   0.3%
Total   2.8%   0.9%
Type of local inhabitant   Fisherman   Farmer
Even if the radiological releases from the Daya Bay site were to reach their regulatory limit, the dosage for the most exposed members of the public would be within 0.14 millisieverts. This should be compared with an average annual dosage of around 0.5 millisieverts for the Hong Kong public from all artificial sources (mainly due to medical treatment and diagnosis) and of about 3.0 millisieverts from various natural sources. Since the actual releases at the Daya Bay site are much lower than the permitted amounts, the effective dose of the most exposed members of the public are very much lower.
[ Annual Environmental Highlights ]