TNAG-1776-FCO40-2530-Daya-Bay-nuclear-power-station-project-safety-concerns-in-Ho-1988 — Page 183

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Hong Kong has 28 marine fish culture zones, 1 350 hectares of fresh water fish ponds, plus a much larger supply of marine capture products from outside Hong Kong's territorial waters. For similar reasons to those given in the section on water supplies it is highly unlikely that any conceivable accident at Daya Bay could cause any significant contamination in fish, however to give public reassurance it may be prudent to carry out some representative sampling of fish caught in areas which may have been effected by the passage of the plume. It is also possible to estimate the level of radioactivity in fish and other seafood from measurements of the radioactivity in the water in which they are located (refs 36 and 43).

Application of Countermeasures for Agricultural Produce and Food

During the planning for any major reactor accident, information should be collated about the location of farms, markets, etc., within Hong Kong, together with details of points of entry of all imported foodstuffs. Various reactor accident scenarios should be studied and for each scenario the likely effects on the food chain should be considered. Using the results of these studies the Incident Assessor, with assistance from the Agriculture and Fisheries Department, or the Municipal Services Branch, as the case may be, would, in the event of an accident at Daya Bay, identify the food pathways and the geographical areas which may be affected. Initially, monitoring and sampling teams would be sent out to delineate the affected arcas. Having identified and confirmed by initial monitoring and sampling which areas and which foodstuffs are affected, the Agriculture and Fisheries Department/ Municipal Services Branch should consider the need for interdiction of any produce/foodstuffs. The Director of the Agriculture and Fisheries/Secretary for Municipal Services should be responsible for introducing or relaxing any bans on the distribution, importation, and sale of produce/foodstuffs. However, they will be advised on this by the CCC who in turn will be advised by the MAC.

Initially, bans on produce will need to be based upon some representative monitoring and sampling results. Later when more detailed results are available, the particular produce and areas of the bans can be refined.

The Agriculture and Fisheries Department should always keep the CCC Controller informed of their actions, and he in turn will keep the public informed.

In all cases of a release of radioactivity affecting Hong Kong, the public should be advised to wash any potentially contaminated food before consumption.

Consideration must be given to the disposal of any produce deemed to be unfit for consumption. This task is likely to be outside the expertise of the Agriculture and Fisheries Department, and assistance from other Government Departments and Agencies will be required.

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9.7 Beyond Design-Basis Accidents

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Any design-basis accident at the Daya Bay reactor would not require plume countermeasures, such as sheltering or evacuation, to be introduced in Hong Kong. It is, however, a requirement of all contingency plans to consider how the plan could be extended to cope with larger accidents. In the highly unlikely event of such an accident occurring at Daya Bay, potential doses to individuals in the north-eastern sector of Hong Kong could be such that some plume countermeasures might be desirable, particularly sheltering. The purpose of this section is to discuss the actions which may be necessary to deal with large, beyond design-basis, accidents. Such accidents are highly improbable, perhaps impossible, with the type of PWR being constructed at Daya Bay, however for completeness consideration should be given to such hypothetical accidents.

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