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Deposition of artificial radionuclides from atmospheric Nuclear Weapon Tests estimated by soil inventories in French areas low-impacted by Chernobyl

Le Roux, Gaël and Duffa, Céline and Vray, Françoise and Renaud, Philippe Deposition of artificial radionuclides from atmospheric Nuclear Weapon Tests estimated by soil inventories in French areas low-impacted by Chernobyl. (2010) Journal of Environmental Radioactivity, 101 (3). 211-218. ISSN 0265-931X

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Official URL: http://dx.doi.org/10.1016/j.jenvrad.2009.10.010

Abstract

Soil inventories of anthropogenic radionuclides were investigated in altitudinal transects in 2 French regions, Savoie and Montagne Noire. Rain was negligible in these 2 areas the days after the Chernobyl accident. Thus anthropogenic radionuclides are coming hypothetically only from Global Fallout following Atmospheric Nuclear Weapon Tests. This is confirmed by the isotopic signatures (238Pu/239þ240Pu; 137Cs/239þ240Pu; and 241Am/239þ240Pu) close to Global Fallout value. In Savoie, a peat core age-dated by 210Pbex confirmed that the main part of deposition of anthropogenic radionuclides occurred during the late sixties and the early seventies. In agreement with previous studies, the anthropogenic radionuclide inventories are well correlated with the annual precipitations. However, this is the first time that a study investigates such a large panel of annual precipitation and therefore of anthropogenic radionuclide deposition. It seems that at high-altitude sites, deposition of artificial radionuclides was higher possibly due to orographic precipitations.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S0265931X09002434
HAL Id:hal-00977781
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Institut de Radioprotection et de Sûreté Nucléaire - IRSN (FRANCE)
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Funders:
Institut de Radioprotection et de Sûreté Nucléaire
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Deposited On:11 Apr 2014 13:48

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