摘要
The CN-85 nuclear track detector has been implemented for determining uranium concentration in human urine sample for different radiation workers in different Iraqi government, hospitals （nuclear medicine unit worker, X-ray and MST worker {the ministry of science and technology}）, for different ages,gender and working years.The exposure method was used by immersing CN-85 detectors in urine samples for four weeks, then CN-track detectors were etched by 6.25 N NaOH for 90 mints. The alpha emitter＇s concentrations for urine samples were calculated in comparison with standard samples. The results show that the average of uranium concentration for nuclear medicine 1.2725 ppb, 1.1896 ppb for X-ray workers, 1.3858 ppb for MST, 1.412 for CTS worker, and 0.848 ppb for control peoples. The average uranium concentration for nuclear medicine, X-ray, MST, and CTS （meal only） workers was 1.277 ppb, 1.1969 ppb, 1.3858 ppb and 1.463 ppb. While 1.25 ppb, 1.158 ppb, 1.385 ppb, and 1.293 ppb for female respectively, while for control people was 0.849 ppb for meal and 0.846 ppb for female. The results of this work regarding the dependence of concentrations on the person＇s occupation, years of service, sex and age.
