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Radiological risk assessment of fuel fabrication facility at Al- Tuwaitha nuclear site
Yousif M. Zayir Al-Bakhat
,
Altaf Abdul Majeed Salman
,
Zainab M. Jbara
Iraqi Journal of Physics, 2016, Volume 14, Issue 31, Pages 99-107
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The specific activity of 29 soil samples collected from Fuel Fabrication Facility FFF at AL-Tuwaitha site
,
20 km south of Baghdad were determined using HPGe detector in a low background configuration
,
it's relative efficiency of 40%
,
and resolution of 2keV for the 1332 keV gamma ray emission of 60Co. The range of activity concentrations 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 assess any radiological hazard to human health
,
the absorbed gamma dose rate D in air at 1m above the ground surface was calculated in the range
,
18.87 to 36.46 nGy/h
,
the outdoor annual effective dose equivalent AEDE was evaluated to vary from 0.0039 to 0.0076 mSv/y with the mean value 0.0059 mSv/y
,
this value comparable to the worldwide effective dose 0.48mSv/y.The Radium Equivalent Raeq for all samples were evaluated and were lower than the accepted safety limit value of 370 Bq/kg.The results indicated that the radiation of hazards from primordial radionudlides in all samples in this study is not significant.Raeq activities
,
Annual effective dose
,
External hazard index.
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