A survey of super(90)Sr and super(137)Cs activity levels of retail foods in Japan

A comprehensive survey was conducted on super(90)Sr and super(137)Cs activity levels in retail foods purchased from retail markets all over Japan during the period 1989-1994, and the annual effective dose equivalent due to dietary ingestion was estimated. The concentrations of super(90)Sr and super(...

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Bibliographic Details
Published in:Journal of environmental radioactivity 1998-01, Vol.41 (3), p.287-305
Main Authors: Abukawa, Johji, Tsubuku, Chiyo, Hayano, Kazuhiko, Hirano, Kemmei
Format: Article
Language:English
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Summary:A comprehensive survey was conducted on super(90)Sr and super(137)Cs activity levels in retail foods purchased from retail markets all over Japan during the period 1989-1994, and the annual effective dose equivalent due to dietary ingestion was estimated. The concentrations of super(90)Sr and super(137)Cs in the food samples were determined using gamma -ray spectrometry and the radiochemical method. The following were clarified by this study: (1) The super(90)Sr and super(137)Cs activity concentration levels were below 1 Bq kg super(-1) for almost all food samples except for the dried foods. (2) The activity concentration levels of super(90)Sr and super(137)Cs in foods of animal origin were different from those of plant origin. Generally, the former had higher super(137)Cs and lower super(90)Sr activity concentrations than the latter. (3) The mean and maximum values of the annual effective dose equivalent from a dietary intake of super(90)Sr and super(137)Cs by the consumption of retail foods were estimated to be as low as 1.3 and 4.1 mu Sv, respectively.
ISSN:0265-931X