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Adsorption of Cs-134 onto Two Different Types of Roof Materials During Summer and Winter Conditions

机译：夏季和冬季条件下Cs-134在两种不同类型屋顶材料上的吸附

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The authors report the progress of an investigation of natural contamination of two types of roof material, typical in Norwegian and Swedish buildings. Cs-134 was sprayed onto experimental roofs, covered with tar-paper or iron plates, under dry conditions and on top of snow. Natural decontamination was examined by measuring the Cs-134 content in the run-off water. More than 70% of added Cs-134 ran off the iron plate roof during normal rainfall, while on the tar-paper roof only 3% was removed during the same rainfall. From an experiment performed on tar-paper roof in winter it was found that the first run-off water contained 16% of the applied activity. 15 days after initiation of the experiment there was no more snow left on the roof, and 47% of the added activity had run off. (Atomindex citation 16:064001)

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