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IRSN, Institut de radioprotection et de sûreté nucléaire

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Enhancing Nuclear Safety


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Mean features of radionuclide contamination for freshwater fish under chronic waterborne and food-chain exposure : influence of the fish dietary habits on the dose calculation to humans.

J. Garnier-Laplace, K. Beaugelin-Seiller, C. Adam, J. P. Baudin Verh. Internat. Verein Limnol., 28, 1294-1298

Summary

In the legislative context of new recommendations for limiting public exposure in the field of radioprotection, regulators need radionuclide transfer models for the prediction of environmental dose assessment. Waterways constitute a major group of ecosystems that receive low-level radioactive liquid wastes discharged from nuclear facilities. The interest of freshwater radioecology lies in the importance of the use of water for human activities, such as fish edible parts ingestion. To this end, the CASTEAUR code herein proposes to apply a simplified. method for rapid temporal and spatial assessment of the transfer of radionuclides between and in the main biotic (phytoplankton, zooplankton, benthos and fish) and abiotic (water, suspended matters, sediment) components of the freshwater ecosystem (BEAUGELIN-SEILLER et al. 2000). In this study, this code was run (1) to assess the influence of dietary habits for fish on their contamination level in the realistic context of chronic liquid effluent releases from the Marcoule fuel reprocessing plant (lower part of the Rhone River, France), and (2) to estimate the influence of this food-chain effect on the dose to humans resulting from the consumption of fish flesh.

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