| Li Weilin,Tang Zhongliu,She Guizhi,et al.Radioepidemiological studies on workers in uranium fuel plants and gaseous diffusion plants[J].Chinese Journal of Radiological Medicine and Protection,1995,15(4):264-268 |
| Radioepidemiological studies on workers in uranium fuel plants and gaseous diffusion plants |
| Received:October 18, 1994 Revised:February 15, 1995 |
| DOI： |
| KeyWords:Radiation epidemiology ionizing radiation cohort study cancer standarized mortality ratio |
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| Abstract:: |
| This retrospective study of causes of death includes workers in nuclear fuel element plants and gaseous diffusion plants. The observation popultion consisted of 3652 workers in exposure group and 5393 workers in control group,with 53813 and 81650 person-years in the above two groups respectively during the period from 1971 to 1985 (1986) .The individual committed effective dose was less than 1 mSv per year and the accumulative dose was about 10 mSv in the period. In the observation period, 104 and 253 persons died in the exposure and control groups,repectively.The numbers of cancer death in these two groups were 49 and 82, respectively. The crude mortality rates were 193.26×10-5/person years and 309.86×10-5/person years, the cancer mortality rates were 91.06×10-5/person years and 100.43×10-5/person years, respectively.There was no significant difference in crude mortality rates betweenthe two groups after age adjustment. For standardized mortality ratio (SMR) of cancer,the calculation was carried out in the light of national survey of this SMR in small cities in 1973~1975.The results showed that SMRs of both groups were less than 1 and there was no significant difference between the two groups. So,there was no evidence of incidence increment of radiogenic cancer in workers exposed to low-level ionizing radiation. |
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