Orita Makiko, Nakashima Kanami, Hayashida Naomi, Endo Yuuko, Yamashita Shunichi, Takamura Noboru
Department of Global Health, Medicine, and Welfare, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki 8528523, Japan.
Division of Strategic Collaborative Research, Center for Promotion of Collaborative Research on Radiation and Environment Health Effects, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki 8528523, Japan.
Sci Rep. 2016 Jun 23;6:28470. doi: 10.1038/srep28470.
We evaluated the current concentrations of radiocesium in local foods collected in Kawauchi Village, which is located less than 30 km from Fukushima Daiichi Nuclear Power Station, to minimize public anxiety regarding internal radiation exposure through the consumption of locally produced foods after the 2011 Fukushima accident. The number of samples exceeding the regulatory radiocesium limit (100 Bq/kg for general foods) was five out of 4,080 vegetables (0.1%), 652 of 1,986 (32.8%) among edible wild plants and fungi, and eight of 647 (1.2%) in fruits. Our study confirmed that the internal radiation doses of ingesting these foods are acceptably low compared to the public dose limit, ranging from 24.4 to 42.7 μSv for males and from 21.7 to 43.4 μSv for females, although the potential for radiation exposure still exists. Long-term comprehensive follow-up should take place to clarify trends in radiocesium concentrations in local foods and the committed effective doses found in Fukushima-area residents. By constructing a system that allows residents to access information on radiocesium concentration in foods, a risk communication model between specialists and residents could be developed in the recovery phase after the Fukushima accident.
我们评估了川内村采集的当地食物中放射性铯的当前浓度。川内村距离福岛第一核电站不到30公里。在2011年福岛事故之后，此举旨在尽量减少公众对因食用当地生产的食物而遭受体内辐射暴露的担忧。超过放射性铯监管限值（一般食物为100贝克勒尔/千克）的样本数量为：4080份蔬菜中有5份（0.1%），1986份可食用野生植物和菌类中有652份（32.8%），647份水果中有8份（1.2%）。我们的研究证实，与公众剂量限值相比，摄入这些食物所产生的体内辐射剂量低到可以接受，男性为24.4至42.7微希沃特，女性为21.7至43.4微希沃特，不过辐射暴露风险依然存在。应进行长期全面跟踪，以弄清当地食物中放射性铯浓度的变化趋势以及福岛地区居民的待积有效剂量。通过构建一个让居民能够获取食物中放射性铯浓度信息的系统，在福岛事故后的恢复阶段，可以建立起专家与居民之间的风险沟通模式。
