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  1. Man-made radioactivity in the Almanzora Gulch and Beach edge of Palomares, Spain.

    Article - En anglais

    The 239+240Pu, 238Pu and 137Cs distribution along the Almanzora Gulch and beach edge have been studied.

    These areas were affected by the accident of 1966, in which a non-nuclear explosion of two thermonuclear bombs occurred.

    Fluvial sediments at 0-5 cm (in 1990) and 0-10,10-20,20-30 cm depth (in 1991) were sampled.

    The surface inventory (0-5 cm) of radionuclides ranges from 0.4 to 1.8 Bq. m2 of 239+240Pu and from 1 to 60 Bq. m2 of 137Cs.

    The estimated total inventory (0-30 cm) shows values from 20 to 264 Bq. m-2 of 239+240Pu and from 328 to 1147 Bq. m-2 of 137Cs.

    The ratio 239+240Pu/137Cs changes significantly close to the river mouth, probably due to the different behaviour of both radionuclides.

    At one sampling station a contribution from the Palomares accident was noted based on the ratio 238Pu/239+240Pu.

    It seems evident that until no influence from the Chernobyl accident has been detected in this area.

    The granulometry of the sediments manifests the river hydrodynamics, a dry gulch with periods of floods typical of certain Mediterranean rivers.

    An important input of terrigenous material containing radionuclides to the adjacent continental shelf occurs in these periods.

    Mots-clés Pascal : Espagne, Césium, Plutonium, Radioactivité, Dosimétrie, Relation dose profondeur, Hydrodynamique, Sédiment, Répartition spatiale, Europe, Epidémiologie

    Mots-clés Pascal anglais : Spain, Cesium, Plutonium, Radioactivity, Dosimetry, Depth dose relation, Hydrodynamics, Sediments, Spatial distribution, Europe, Epidemiology

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 95-0219719

    Code Inist : 002B30A02A. Création : 09/06/1995.