Three hundred and thirteen samples of carp and trout were analysed for their ¹³⁷Cs activity concentrations during a 2-year survey in Polish farms. The ¹³⁷Cs contents were below MDA values in most samples. The combined mean activity concentrations were about 2 Bq/kg. The highest ¹³⁷Cs concentration did not exceed 6 Bq/kg. The effective annual dose from consumption of freshwater fish was evaluated.
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