Giri, Soma (2013) Estimation of annual effective dose due to ingestion of natural radionuclides in foodstuffs and water at a proposed uranium mining site in India. International Journal of Radiation Biology , 89 (12). pp. 1071-1078. ISSN 0955-3002

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Abstract

Purpose : To study the distribution of 210 Po, 226 Ra, 230 Th and U(nat) (naturally occurring radioisotopes of uranium [ 234 U, 235 U and 238 U]) in food and water around the Bagjata uranium mining area in India. Materials and methods : Radionuclides were analyzed in food samples of plant and animal origin after acid digestion. Intake and ingestion dose of the radionuclides were estimated. Results : 210 Po, 226 Ra, 230 Th and U(nat) in all the dietary components ranged widely from 0.2 – 36, 0.02 – 1.58, 0.01 – 2.8 and 0.017 – 0.39 Bqkg -1 , respectively. The range of 226 Ra and U(nat) in water was 3.5 – 206 and 12.6 – 693 mBql _1 , respectively. The intake of radionuclides considering food and water was calculated to be 760 BqY _1 while the ingestion dose was 601 SvY _1 . The estimated doses reflect the natural background dose via route of ingestion, which is below the 1 mSvY _1 limit set by the International Commission on Radiological Protection (ICRP). However, the doses are more than the dose constraint of 300 μ SvY _1 as suggested by the ICRP for members of the public for planned disposal of long-lived radioactive waste. Conclusion : The study confirms that current levels of radionuclides do not pose significant radiological risk to the local inhabitants, but they need close investigation in the near future.

Item Type:	Article
Uncontrolled Keywords:	Dietary components , natural radionuclides , ingestion dose , intake
Subjects:	Envieronmental Management Group
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	08 Feb 2018 04:09
Last Modified:	08 Feb 2018 04:09
URI:	http://cimfr.csircentral.net/id/eprint/1881

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