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Sökning: WFRF:(Thörring Håvard)

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1.
  • Andersson, Kasper G, et al. (författare)
  • Revision of deposition and weathering parameters for the ingestion dose module (ECOSYS) of the ARGOS and RODOS decision support systems.
  • 2011
  • Ingår i: Journal of environmental radioactivity. - : Elsevier BV. - 1879-1700 .- 0265-931X.
  • Tidskriftsartikel (refereegranskat)abstract
    • The ECOSYS model is the ingestion dose model integrated in the ARGOS and RODOS decision support systems for nuclear emergency management. The parameters used in this model have however not been updated in recent years, where the level of knowledge on various environmental processes has increased considerably. A Nordic work group has carried out a series of evaluations of the general validity of current ECOSYS default parameters. This paper specifically discusses the parameter revisions required with respect to the modelling of deposition and natural weathering of contaminants on agricultural crops, to enable the trustworthy prognostic modelling that is essential to ensure justification and optimisation of countermeasure strategies. New modelling approaches are outlined, since it was found that current ECOSYS approaches for deposition and natural weathering could lead to large prognostic errors.
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3.
  • Hjellström, Martin, 1993, et al. (författare)
  • Radioecological transfer factors for Nordic subpopulations for assessment of internal committed dose from atmospheric fallout of radiocaesium (NKS-437)
  • 2020
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • Measurements of whole body burden of radiocaesium have for a long time been performed in Finland, Norway and Sweden, and used to estimate the impact of the nuclear weapons fallout, as well as the Chernobyl accident, on the populations in the three countries. During this work, it has become evident that the existing data can be analysed to a greater extent than has been possible within the frames of this project. For example, the issue of modelling uptake of caesium from the food chain, based on ecological half-life or aggragated transfer function, Tag(t), in areas where there are reminiscences of previous fallout occasions of the same extent as the present fallout, has to be further investigated. Modelling is a useful tool to check our state of knowledge and reveal gaps in data, which have to be considered in case of future fallout events. This also emphasizes the need for maintaining continuous time-series of measurements on atmospheric deposition as well as the body-burdens in various populations, especially among those known in advance to be sen-sitive to radioecological transfer of fission products.
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