Long-term investigations of radiocaesium activity concentrations in carps in north Croatia after the Chernobyl accident

Details Long-term investigations of radiocaesium activity concentrations in carps in north Croatia after the Chernobyl accident Long-term investigations of radiocaesium activity concentrations in carps in north Croatia after the Chernobyl accident

2007-01-16

arxiv.org/abs/physics/0701181v1

Physics

Medical Physics

21 pages, including 5 figures; final version; accepted by Journal of Environmental Radioactivity

Scientific paper

Long-term investigations of radiocaesium activity concentrations in carps in the Republic of Croatia are presented. The radiocaesium levels in carps decreased exponentially and the effective ecological half-life of 137Cs in carps was estimated to be about 1 year for 1987-2002 period and 5 years for 1993-2005 period. The observed 134Cs:137Cs activity ratio in carps has been found to be similar to the ratio that has been observed in other environmental samples. Concentration factor for carps (wet weight) was roughly estimated to be 128 +/- 74 Lkg-1, which is in reasonable agreement with model prediction based on K+ concentrations in water. Estimated annual effective doses received by 134Cs and 137Cs intake due to consumption of carps for an adult member of Croatian population are small, per caput dose for the 1987 - 2005 estimated to be 0.5 +/- 0.2 microSv. Due to minor freshwater fish consumption in Croatia and low radiocaesium activity concentrations in carps, it can be concluded that carps consumption was not a critical pathway for the transfer of radiocaesium from fallout to humans after the Chernobyl accident.

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