Yonehara H, Aoyama T, Radford E P, Kato H, Sakanoue M
Department of Experimental Radiology, Shiga University of Medical Science, Japan.
Health Phys. 1995 May;68(5):683-8. doi: 10.1097/00004032-199505000-00008.
A measurement of indoor radon (222Rn) concentrations in Hiroshima and Nagasaki was carried out to assess the variability of exposure expected among atomic bomb survivors. Two hundred dwellings, mostly belonging to members of the fixed cohort of atomic bomb survivors under study by the Radiation Effects Research Foundations, were selected for this measurement. The geometric mean values of the radon concentrations for 100 dwellings in Hiroshima and 99 dwellings in Nagasaki measured by Track-Etch Type SF detectors were 56.8 Bq m-3 and 28.5 Bq m-3, respectively. No statistically significant difference was observed between lung cancer mortalities in the low-dose range in the two cities. However, apparent values of the mortality rate for low dose range in Hiroshima are consistently greater than those in Nagasaki. The exposure to radon and its progeny and the atomic bomb radiation effect might have some cooperative effects on the lung cancer incidence.
为评估原子弹幸存者中预期的暴露变异性，对广岛和长崎的室内氡（222Rn）浓度进行了测量。此次测量选取了200处住宅，其中大部分属于辐射效应研究基金会正在研究的原子弹幸存者固定队列的成员。通过径迹蚀刻型SF探测器测量的广岛100处住宅和长崎99处住宅的氡浓度几何平均值分别为56.8 Bq m-3和28.5 Bq m-3。两个城市低剂量范围内的肺癌死亡率之间未观察到统计学上的显著差异。然而，广岛低剂量范围死亡率的表观值始终高于长崎。氡及其子体暴露与原子弹辐射效应可能对肺癌发病率有一些协同作用。
