Abstract
To determine radiological impact of composite food served at Pakistan Institute of Nuclear Science and Technology (PINSTECH) on its worker, cooked meals were collected during 2000–2007 and analysed by gamma and beta radiometry techniques for naturally occurring radionuclides and fission fragments. The only measurable radionuclide was naturally occurring 40K. Its activity range was 40±1.5 to 182.4±3.8Bq kg−1 with cumulative average value of 89.4±35.1Bq kg−1. Based on annual meals taken by the worker in cafeteria, the measured value gives committed effective dose of 74μSv and estimated cancer risk factor of 1.5×10−4 that is a minor fraction of the total risk of 5×10−3. It depicts that food served at PINSTECH cafeteria is radiologically safe for consumption.
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