Abstract
The specific activity of 29 soil samples collected from FuelFabrication Facility FFF at AL-Tuwaitha site, 20 km south ofBaghdad were determined using HPGe detector in a low backgroundconfiguration, it's relative efficiency of 40%, and resolution of 2keVfor the 1332 keV gamma ray emission of 60Co. The range of activityconcentrations of 226Ra, 232Th and 40K were between (12.56-31.96),(10.2-18.4) and (47.47-402.1) Bq/kg respectively. In order to assessany radiological hazard to human health, the absorbed gamma doserate D in air at 1m above the ground surface was calculated in therange (18.87 to 36.46) nGy/h; the outdoor annual effective doseequivalent AEDE was evaluated to vary from 0.0039 to 0.0076mSv/y with the mean value 0.0059 mSv/y, this value comparable tothe worldwide effective dose 0.48mSv/y. The Radium EquivalentRaeq for all samples were evaluated and were lower than the acceptedsafety limit value of 370 Bq/kg. The results indicated that theradiation of hazards from primordial radionudlides in all samples inthis study is not significant.
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