TNAG-1502-FCO40-2060-Guangdong-nuclear-power-station-project-at-Daya-Bay-safety-c-1986 — Page 112

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AUG 16 '86 11:38 TIB (OOU) HK GOVT

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P.6

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Radiation dose would be received via five exposure pathways. is fortunate that there is a distance separating the Daya Bay

Nuclear Power Plant from Hong Kong, The Accident Assessment Phase I

report says that because of the distance separating the Daya Bay Nuclear Power Plant from Hong Kong, only a major, and extremely improbable, accident, releasing a substantial fraction of the fission

products from the reactor core, could have significant consequences for the territory. Radiological consequences of releases are evaluated using the CRACUK code. The report then describes how radiation dose would be received via five exposure pathways, the health effects

and the counter measures.

Regarding the counter measures, delayed evacuation should be effected 24 hours after the release to the environment, and land should be

banned from use, including habitation and farming, According to the

Accident Assessment Phase I report, rainfall is somewhat more frequent,

and much heavier, at the times of the year when the wind blows less

frequently from the site of the Daya Bay Nuclear Power Plant to Hong

Kong. As rain has a substantial influence upon the rate of removal

of radionuclides from the plume, it is undesirable to ignore these

correlations. Regarding the release probabilities, international experience suggests that a total core melt probability of less than

once chance in ten thousand per reactor year,

Phase II will focus the researches on the assessment of terrestial

and aquatic food-chain pathways of exposure.

Members of the Executive Council were reminded at the meeting on

6.5.86 to have concern about the safety of the nuclear power, and

the discussion paper distributed is entitled 'Nuclear Accident in

USSR Implications for Daya Bay Nuclear Project in Hong Kong'.

Though the Government of Hong Kong will have to wait until some time next year before it can know how the Daya Bay Nuclear Power Plant would affect Hong Kong, the authorities have already expressed

/to the