RECONSTRUCTION OF TWO VICTIM’ POSTURING BASED ON THE INDUCED RADIOACTIVITIES IN THEIR BONES IN THE CRITICALITY ACCIDENT IN TOKAI-MURA, JAPAN
RECONSTRUCTION OF TWO VICTIM’ POSTURING BASED ON THE INDUCED RADIOACTIVITIES IN THEIR BONES IN THE CRITICALITY ACCIDENT IN TOKAI-MURA, JAPAN
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根据日本东海村危急事故中两名受害者骨骼中的诱发放射性重建其姿势
DOI：
10.1097/00004032-200207000-00002
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发表时间：
2002
期刊：
影响因子：
2.2
通讯作者：
M. Akashi
中科院分区：
文献类型：
--
作者：
K. Miyamoto;Y. Watanabe;M. Yukawa;H. Takeda;Y. Nishimura;N. Ishigure;T. Hirama;M. Akashi
1999年9月30日，在日本茨木县东海村的一个铀转化设施发生的一次临界事故中，三名工人受到中子和伽马射线的严重照射。在两名受害者死亡后，对骨基质中中子诱导的32 P和45 Ca进行了放射化学分析。结果发现，在他们的身体骨骼中产生了超过几百万贝克勒尔的两种核素。结果表明，中子注量在体内的分布不均匀，由此可以推断出两名工作人员在暴露期间相对于裂变源的位置，即，在第一次核爆炸的时候。对于先死的受害者，他的身体的中心部分的活动多于他的四肢。而且，在他身体的中央部分，右侧比左侧显示出更多的活动。至于第二个人，放射性活动表明，他全身都受到相当均匀的中子照射，尽管放射性活动的几何分布变化很大，足以假定他的方位。这种信息的几何分布的中子感生的放射性在骨骼中，可以用来重建的姿态的受害者，这是必要的，以估计其表观吸收剂量。
On 30 September 1999, three workers were severely exposed to neutrons and gamma rays in a criticality accident that occurred at a uranium conversion facility in Tokai-mura, Ibaraki Prefecture, Japan. Radiochemical analyses of 32P and 45Ca induced by neutrons in bone matrix were carried out after the deaths of two of the victims. It was found that more than several million becquerels of both nuclides had been produced in their body skeletons. Results showed non-homogeneous distributions of neutron fluence in the bodies, from which it could be deduced how both workers were positioned relative to the fission source during exposure, i.e., at the moment of the first nuclear excursion. For the victim who died first, the activities in the central part of his body were more than those of his extremities. Also, in the central part of his body, the right side showed more activities than the left side. As for the second man, the activities indicated rather uniform exposure to neutrons to the whole body although the geometrical distribution of the activity varied enough to assume his orientation. Such information on the geometrical distribution of neutron-induced radioactivities in the skeleton can be used to reconstruct the posturing of the victims, which is necessary to estimate their apparent absorbed doses.