CONICET | Buscador de Institutos y Recursos Humanos

Under the International Atomic Energy Agency (IAEA) Modelling and Data for RadiologicalImpact Assessments (MODARIA II) Programme, Working Group 4 activities included collatingradionuclide transfer data from Japan following the Fukushima Daiichi Nuclear Power Plantaccident and separately collating concentration ratio (CR) data for root uptake of radionuclides bycrops grown in tropical and arid climates. In this paper, the newly compiled radiocaesium CR datafor fruit from Japan, tropical and arid climates have been combined with the data originallycompiled for the IAEA Technical Reports Series No. 472 (TRS 472) and additional data identifiedfrom the literature to produce an enhanced MODARIA II dataset of fruit radiocaesium CR values.Statistical analysis of the MODARIA II dataset by climate class (based on the Köppen?Geigerclimate classification) indicated that the CR values for tropical climates were significantly higher(p < 0.05) than those for arid, temperate and cold climates. Statistical analysis of the MODARIA IIdataset by soil group (based on soil texture) indicated that the CR values for coral sand soil(tropical climates only) and organic soil (temperate climates only) were significantly higher(p < 0.05) than those for the clay, loam and sand soil groups. Statistical analysis of the MODARIAII dataset by plant group (based on plant morphology) indicated that the CR values for non-woodytrees (tropical climate bias) were significantly higher (p < 0.05) than those for herbaceous plants,shrubs and woody trees. Comparison of the MODARIA II dataset with original TRS 472 valuesshowed only small changes in the fruit radiocaesium CR values for herbaceous plants and shrubs intemperate climates. There was a decrease in the CR values for woody trees in temperate climateacross all soil groups. There was also a decrease in the CR values for tropical climates for allcomparable soil groups.

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