Kurihara Osamu, Nakagawa Takahiro, Takada Chie, Tani Kotaro, Kim Eunjoo, Momose Takumaro
Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai-mura, Naka-gun, Ibaraki, Japan Present address: National Institute of Radiological Sciences, Chiba-city, Chiba, Japan.
Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai-mura, Naka-gun, Ibaraki, Japan.
Radiat Prot Dosimetry. 2016 Sep;170(1-4):420-4. doi: 10.1093/rpd/ncw002. Epub 2016 Feb 10.
The authors describe the results of direct measurements made on three persons who stayed in Tokai-mura, a village located ∼110 km south of the Fukushima Daiichi Nuclear Power Station (FDNPS), during the arrival of significant radioactive plumes released from the FDNPS as a consequence of the Tohoku earthquake/tsunami/FDNPS accident in March 2011. These measurements were made using a NaI(Tl) spectrometer and a whole-body counter shortly after the accident. Their thyroid equivalent doses ((131)I) were estimated to be 0.9-1.4 mSv under the assumption of acute intake via inhalation on 15 March, when the first significant release event was observed. Although greatly depending on the physicochemical form of iodine, the intake amount ratios of (131)I to (137)Cs for the three subjects were calculated as 2.7-3.7, which were much smaller than the radioactivity ratio (7.8) found in air sampling at the same site.
作者描述了对三名人员进行直接测量的结果。这三名人员在2011年3月东北地震/海啸/福岛第一核电站事故导致福岛第一核电站释放大量放射性烟羽期间，身处位于福岛第一核电站以南约110公里处的东海村。这些测量是在事故发生后不久，使用碘化钠（铊）光谱仪和全身计数器进行的。在假设3月15日通过吸入急性摄入的情况下，他们的甲状腺当量剂量（碘-131）估计为0.9 - 1.4毫希沃特，当时观察到了首次重大释放事件。尽管碘的摄入总量在很大程度上取决于其物理化学形态，但计算得出这三名受试者碘-131与铯-137的摄入量比值为2.7 - 3.7，远低于在同一地点空气采样中发现的放射性比值（7.8）。
