Radiocesium in children residing in the western districts of the Bryansk Oblast from 1991-1996
Radiocesium in children residing in the western districts of the Bryansk Oblast from 1991-1996
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DOI：
10.1097/00004032-200008000-00011
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发表时间：
2000-08-01
期刊：
影响因子：
2.2
通讯作者：
Yamashita, S
中科院分区：
文献类型：
--
作者：
Hoshi, M;Konstantinov, YO;Yamashita, S
1991-1996年，对居住在布良斯克州（俄罗斯）西部的儿童进行了Cs-137身体负荷的测量，切尔诺贝利事故后，该地区的Cs-137污染范围为0.03-3.7 MBq m（-2）。在整个监测期间，26，029次测量的5-15岁儿童体内Cs-137比活度（SA）的平均值和中位数分别为85 Bq kg（-1）和49 Bq kg（-1）。在受检者人数不少于50人的住区，不同居住地的平均值从30-342 Bq kg（-1）不等。有一个中等强度的关系之间的平均SA的解决方案和区域的污染水平与Cs-137。1992-1995年春、秋两季，在儿童调查最多的居民点，~（137）Cs体内负荷的比值为1：1.75。这种影响可能归因于饮食的季节性变化。根据调查问卷中关于当地生产的食品的个人消费信息，发现食品对儿童摄入Cs-137的贡献的降序为：肉-蘑菇-牛奶-蔬菜。假设剂量分布将遵循SA值的分布，则评估摄入的Cs-137对全身的内部剂量。年内照射剂量的平均值为0.21 mSv，个人剂量分布的中位数为0.12 mSvy（-1）。总样本中有2%的年剂量超过1 mSv，1994年一名7岁女童的最高个人剂量为9 mSv。
Measurements of Cs-137 body burden were carried out in 1991-1996 for children residing in the western part of Bryansk Oblast (Russia) where area contamination with Cs-137 following the Chernobyl accident varied from 0.03-3.7 MBq m(-2). The mean and median values of Cs-137 specific activity (SA) in the bodies of children 5-15 y old for the whole period of surveillance averaged for 26,029 measurements was 85 Bq kg(-1) and 49 Bq kg(-1), respectively. Mean values in different places of residence varied from 30-342 Bq kg(-1) for the settlements where the number of examinees was not less than 50. There is a moderately strong relationship between mean SA in the settlement and the level of area contamination with Cs-137. A strong seasonal effect on Cs-137 body burden was found. The ratio of average SA values is 1:1.75 for spring to autumn 1992-1995 in the settlement where the largest number of children was examined. This effect might be attributed to a seasonal change in diet. Based on questionnaire information on individual consumption of locally produced foods, the descending rank of contribution of food items to Cs-137 intake by children was found to be: meat-mushrooms-milk-vegetables. Assuming that the dose distribution would follow the distribution of SA values, internal doses to the whole body from ingested Cs-137 were assessed. The mean value of annual internal dose averaged for the whole set of measurements is 0.21 mSv, and the median of the individual dose distribution is 0.12 mSv y(-1). For 2% of the total sample the annual dose exceeded I mSv, with the highest individual dose being 9 mSv in 1994 for a 7-y-old girl.