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1985年与1987年两次对大亚湾核电站周围50km半径范围内的土壤、生物和水的放射性本底及γ外照射空气吸收剂量率进行了调查。结果是在同一个剖面内,上下层间土壤中总放射性含量变化不大,但点间波动幅度较大;表层土壤中天然放射性核素含量~(40)K>~(232)Th>~(238)U>~(226)Ra,人工放射性核素~(137)Cs点间波动很大,每公斤土壤的放射性含量平均值是4.16Bq,波动范围是0～15.32Bq;每公斤水样中总β含量为1.75～1148.76Bq,其顺序是海水>水库水>江、河水>山水;生物样品每公斤鲜样总β含量为5.2～903.3Bq,其中稻草>花生仁>花生壳>稻谷壳>鱼骨>叶菜(青菜>生菜)>大米>肉类(猪肉>鸡肉)>鱼肉>牛奶>蛋类(鸭蛋>鸡蛋)>甘蔗,总α含量为0.05～283.6Bq,其中稻草>花生壳>鱼骨>稻谷壳>花生仁>蛋类>叶菜>大米>甘蔗>肉类>牛奶;γ外照射空气吸收剂量率,室内略高于室外,其变动范围是11.1～17.8Gy·h~(-1)。
In 1985 and 1987, the radioactive background of soils, organisms and water within a radius of 50km around Daya Bay Nuclear Power Station and the dose rate of γ external irradiation air were investigated twice. The results showed that in the same profile, the total radioactive content in the upper and lower layers of soil changed little, but the fluctuation range was larger. The content of natural radionuclides in topsoil was ~ (40) K> ~ (232) Th> ~ ( 238) U> ~ (226) Ra, the radionuclide ~ (137) Cs fluctuated greatly. The average radioactivity per kilogram of soil was 4.16Bq and the fluctuation range was 0 ~ 15.32Bq. The content of total β was 1.75 ~ 1148.76Bq, the order of which was seawater> reservoir water> river, river water> landscape water. The total β content of biological sample per kilogram was 5.2 ~ 903.3Bq, including straw> peanut> peanut shell> Fish bone> Leafy vegetables> Lettuce> Rice> Meat (pork> chicken)> Fish> Milk> Eggs (duck egg> egg)> The content of total α in cane is 0.05 ~ 283.6Bq, Fish bones> Rice husks> Peanuts> Eggs> Leafy vegetables> Rice> Sugarcane> Meat> Milk; γ External radiation Air absorption dose rate, indoor slightly higher than the outdoor, the range of variation is 11.1 ~ 17.8Gy · h ~ -1).