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首页> 外文期刊>Health Physics: Official Journal of the Health Physics Society >Reconstruction of two victims' posturing based on the induced radioactivities in their bones in the criticality accident in Tokai-Mura, Japan.
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Reconstruction of two victims' posturing based on the induced radioactivities in their bones in the criticality accident in Tokai-Mura, Japan.

机译：在日本东海村发生严重事故时，根据两名受害人骨骼中的放射性活度重建两名受害人的姿态。

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摘要

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.
机译：1999年9月30日，在日本茨城县东海村一家铀转化设施发生的一次临界事故中，三名工人严重暴露于中子和伽马射线。两名受害者死亡后，中子在骨基质中对32P和45Ca进行了放射化学分析。据发现，在它们的骨骼中已经产生了超过数百万个两种核素的前壳。结果表明，中子注量在人体中的分布是不均匀的，从中可以推断出在暴露期间，即在第一次核偏移时，两个工人相对于裂变源的位置。对于首先死亡的受害者，其身体中部的活动比四肢的活动更多。同样，在他身体的中央部位，右侧比左侧显示更多的活动。至于第二个人，活动表明相当均匀地暴露于中子到整个身体，尽管活动的几何分布变化足以假定他的方向。这种有关骨架中中子诱发的放射性活度的几何分布的信息可用于重建受害者的姿势，这对于估计他们的表观吸收剂量是必要的。

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