Multi-compartment kinetic–allometric (MCKA) model of radionuclide bioaccumulation in marine fish

Abstract. A model of the radionuclide accumulation in fish taking into account contribution different tissues and allometry is presented. The basic assumptions are as follows. (i) organism represented by several compartments which radionuclides homogeneously distributed. (ii) correspond to three groups organs or tissues: muscle, bones (kidney, liver, gonads, etc.) differing metabolic function. (iii) Two input include gills absorbing contamination from water digestive tract through contaminated food absorbed. (iv) absorbed redistributed between according their functions. (v) elimination assimilated elements each group differs, reflecting differences specific were accumulated. (vi) uptake rates, rate, growth rate depend on scaled mass 3/4 power. analytical solutions system equations describing dynamics assimilation 134Cs, 57Co, 60Co, 54Mn 65Zn, preferably accumulated tissues, exhibited good agreement with laboratory experiments. developed multi-compartment kinetic–allometric was embedded box POSEIDON-R (Maderich et al., 2018b), describes transport water, sediment transfer pelagic benthic webs. applied for simulation fate 60Co routinely released Forsmark Nuclear Power Plant (NPP) located Baltic Sea coast Sweden calculation 90Sr concentration after accident at Fukushima Dai-ichi NPP. Computed concentrations agree measurements much better than calculated using standard whole-body target tissue model. defined generic parameters could be used marine environments without calibration based a posteriori information, important emergency decision support systems.