Abstract
An appreciable portion of human exposure to natural radioactivity comes from food and drinking water. Gross alpha radioactivity has been measured in thirty one food items consumed almost every day by the people of southern part of West Bengal, India, by using the solid state nuclear track detector LR-115. The annual effective doses due to intake of alpha-emitting radionuclides through these food items have also been estimated, and the total average annual dose received by an adultthrough ingestion of these foodstuffs calculated, considering the food habit of the people of the region. The total average annual dose is below the 1 mSv y-1 limit proposed by WHO, and over half of this annual dose comes from consumption of cereals.
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