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In the statistical analyses of the data on occupational radiation exposure at JPDR, statistical features were obtained as follows.(1) The individual doses followed log-normal distribution.(2) In the distribution of doses from one job in controlled area, the logarithm of the mean (μ) depended on the exposure rate (r(mR/h)), and the σ correlated to the nature of the job and normally distributed. These relations were as follows.μ=0.48ln r-0.24, σ=1.2±0.58(3) For the data containing different groups, the distribution of doses showed a polygonal line on the log-normal probability paper.(4) Under the dose limitation, the distribution of the doses showed asymptotic curve along the limit on the log-normal probability paper.
日本保健物理学会の論文