The Transfer of Radionuclides in the Terrestrial Environment

Mette Øhlenschlæger

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    The transfer of radionuclide« in the terrestrial environment have been investigated. The thesis is divided into two parts. Part I; Dynamic model for the transfer of radionuclides in the terrestrial environment. The study comprises the
    development of a compartment model, that simulates the dynamic transport of radioactive pollution in the terrestrial environment. The dynamic processes include, dry and wet deposition, soil resuspension, plant growth, root uptake, foliar interception, animal metabolism, agricultural practice, and production of bread. The ingested amount of radioactivity, by man, is multiplied by a dose conversion factor to yield a dose estimate. The dynamic properties and the predictive accuracy of the model hav« been tested. The results support the dynamics very well and predictions within a factor of three, of a hypothetical accident, are likely. Part II; Influence of plant variety on the root transfer of radiocaesium. Studies of genetic differences, in plant uptake of radiocaesium, were concluded with a pot experiment. Four varieties of spring barley and three varieties of rye-grass have been tested in two types of soil. The results for barley showed a significant difference between the four varieties. Analyses of variance
    confirmed a high root uptake of radiocaesium in the variety Sila and a significantly lower root uptake in the variety Apex in each type of soil. The pattern between the varieties was identical in 1988, 1989 and 1990. Similarly for the grass varieties, one variety, the Italian rye grass, was identified as having the relatively highest uptake of radiocaesium.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherRisø National Laboratory
    Number of pages124
    ISBN (Print)87-550-1739-8
    Publication statusPublished - 1991


    • Risø-M-2934


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