Effects of dynamic behaviour of Nordic marine environment to radioecological assessments: NKS report:

Ó. Halldórsson, Mikhail Iosjpe, Hans Pauli Joensen, Mats Isaksson, G. Jonsson, Kai Logemann, Per Roos, Vesa Suolanen, Thomas Rimon, V. P. Vartti

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Abstract

The goal of the EFMARE project is an analysis of consequences of radioactive releases into marine environment with special attention to the effects of the dynamic behaviour of the Nordic seas to radioecological assessments. The EFMARE project activity has planned to continue for two years (2014-2015).

The main goals for 2014 is development and implementation of the bioac-cumulation process into the models, improvement of the models, compari-son with previous results and testing of the influence of the time of an ac-cident for the radioecological consequences.

Results of implementation of the kinetic model for bioaccumulation proc-esses into the NRPA box model and the DETRA computer code clearly demonstrated that there is a significant quantitative difference between the kinetic modelling approach and the approach based on the constant con-centration rates.

Results of modelling were compared with experimental data on the basis of improved version of the NRPA box model for the Baltic Sea. It is clear demonstration that dynamic modelling of the bioaccumulation processes can provide a more correct description of the concentration of radionu-clides in biota and, therefore, these results support the main goal of the EFMARE project.

With a numerical case study the temporal variability of pollutant dispersal in Icelandic waters was demonstrated and discussed. The results empha-size the necessity to use operational hydrodynamic ocean models in order to forecast pollutant dispersal in Icelandic waters.

The use of particle density can be used for comparison with simulations from the NRPA box model.
Original languageEnglish
Place of PublicationRoskilde
PublisherNKS-Nordic Nuclear Safety Research
Number of pages62
ISBN (Electronic)978-87-7893-407-9
Publication statusPublished - 2015

Publication series

NameNKS B
NameNKS-326

Keywords

  • marine environment
  • hydrodynamic and box modelling
  • bioaccumulation submodel
  • accidents
  • radioecological consequences

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