Internal radiocesium contamination of adults and children in Fukushima 7 to 20 months after the Fukushima NPP accident as measured by extensive whole-body-counter surveys. 福岛核电站事故发生后7到20个月通过全身计数器测得的福岛成人和孩童体内的放射性铯污染数值
The Fukushima Dai-ichi NPP accident contaminated the soil of densely-populated regions in Fukushima Prefecture with radioactive cesium, which poses significant risks of internal and external exposure to the residents. If we apply the knowledge of post-Chernobyl accident studies, internal exposures in excess of a few mSv/y would be expected to be frequent in Fukushima.Extensive whole-body-counter surveys (n = 32,811) carried out at the Hirata Central Hospital between October, 2011 and November, 2012, however show that the internal exposure levels of residents are much lower than estimated. In particular, the first sampling-bias-free assessment of the internal exposure of children in the town of Miharu, Fukushima, shows that the (137)Cs body burdens of all children (n = 1,383, ages 6-15, covering 95% of children enrolled in town-operated schools) were below the detection limit of 300 Bq/body in the fall of 2012. These results are not conclusive for the prefecture as a whole, but are consistent with results obtained from other municipalities in the prefecture, and with prefectural data.
福岛第一核电站事故泄漏的放射性铯污染了福岛县人口稠密地区的土壤，这给当地居民带来了体内外辐射的显著风险。如果我们应用切尔诺贝利事故后系研究所掌握的知识，预计将在福岛县当地广泛造成超过几个毫西弗/年的体内辐射风险。在2011年10月至2012年11月间，我们在平田中心医院开展了大范围全身计数器测量（N = 32,811 ）然而所测数据表明，居民受到的体内辐射程度远低于预计水平。尤其是对福岛镇三春地区孩童的体内辐射程度的第一次无偏见采样评估表明，所有儿童身体负担的（137）铯浓度低于2012年秋天300贝可/体的检测限。（N = 1,383，年龄范围为6-15岁，覆盖了在城镇学校上学孩童中的95 ％）这些结果对整个县来说不具决定性，但与从其他县内城市获取的结果和数据相一致。