HKNIC - Emergency Planning
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Emergency Planning
Emergency planning requires the classification of nuclear emergencies according to their severity, so that those concerned can be notified quickly and the appropriate counter-measures taken.

Nuclear Emergency Classification Emergency Planning Zones
Daya Bay has adopted the International Atomic Energy Agency's four-category system for classifying nuclear emergencies, which can be summarised as follows:
  Alert:
the safety level within the power station may be reduced
  Facility emergency:
radiological consequences of the emergency are confined to a section of the power station
  Site area emergency:
radiological consequences of the emergency are confined to the site of the power station
  General emergency:
radiological consequences of the emergency extend beyond the site boundary



Image Credit: DNMC
Daya Bay has a team of technical staff in permanent readiness to meet the unlikely need for emergency response. More personnel can be put on alert and into action should the level of emergency be raised. External organisations, at the provincial and national levels as well as from overseas, may also be mobilised to assist in the case of higher level emergencies.

The emergency planning zone is the area around a nuclear power station for which measures are drawn up to deal with an emergency, in particular one that may affect areas beyond the power station site itself. The size of the zone varies from country to country, and to some extent from reactor to reactor. The measures consist of plans for evacuation, sheltering, and the control of drinking water and food. Daya Bay uses a 5 kilometre radius evacuation planning zone and a sheltering zone of 10 kilometres, in line with French practice. There is no need for evacuation or sheltering beyond these zones. Food and drinking water will be monitored for possible contamination up to 50 kilometres from the power station. All of these activities will be directed by the Guangdong provincial government.