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MAGNITUDE OF FISSION PRODUCT DEPOSITIONS FROM ATMOSPHERIC NUCLEAR WEAPON TEST FALLOUT IN FRANCE

Philippe Renaud and Didier Louvat

Health Physics, April 2004, vol. 86, n° 4, 353-358

Document type > *Article de revue

Keywords > fallout, fission products, mapping

Research Unit > IRSN/DEI/SESURE/LERCM

Authors > RENAUD Philippe

Publication Date > 20/04/2004

Summary

The external dose attributable to fallout front worldwide atmospheric nuclear testing, which represents about 40% of the total effective dose received before 2000, is dominated by specific fission products such as 95Zr, 140Ba, 106Ru, 103Ru, and 144Ce, which are far less well-documented than 90Sr and 137Cs. The depositions of these nuclides over France were calculated on the basis of activity measurements in air and rainwater samples collected front 1961 to 1977. These depositions were then compared to the same radionu­clides activities measured in grass during that period. This study shows that the transfer and deposition processes occur in a very similar manner for all the studied radionuclides. Depositions calculated in this study, consistent in most cases with UNSCEAR estimates, constitute a good basis for the external dose assessment of nuclear weapon test fallout over Western Europe

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