Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-1271 - C1-1276|
|Published online||25 March 2010|
Identification of sources and distribution of radiocarbon in the vicinity of La Hague nuclear reprocessing plant
Laboratoire des Sciences du Climat et de l'Environnement, UMR 1572 du CEA/CNRS, Domaine du CNRS, 91198 Gif-sur-Yvette cedex, France
2 Institut de Protection et de Sûreté Nucléaire, Département de PRotection de l'Environnement, Service d'Études et de Recherches Radioécologiques dans les Milieux NATurels, IPSN/DPRE/SERNAT/LERFA, 50130 Cherbourg-Octeville, France
3 Marine Nationale, Groupe d'Études Atomiques (GEA), BP. 34, 50115 Cherbourg Naval, France
The terrestrial environment in the vicinity of La Hague nuclear reprocessing plant (COGEMA) is potentially influenced by two sources (atmospheric and marine) and by three ways of radionuclides transfer: 1) atmospheric fallout from old nuclear bombs experiments, 2) atmospheric fallout from gaseous throwing out from the reprocessing plant 3) marine aerosol and degassing (sea to land transfer) bearing radionuclides originating from liquid waste from the plant. Institute for Protection and Nuclear Safety (IPSN) has organised since 1997, with the collaboration of the Groupe d'Etudes Atomiques (GEA) de la Marine Nationale and the Laboratoire des Sciences du Climat et de l'Environnement (LSCE/CEA-CNRS), studies to identify radionuclides sources (atmospheric and marine) and to provide an evaluation of the radiocarbon around La Hague nuclear reprocessing plant and to follow the concentration evolution versus time. A sampling strategy has been established to provide a map of the distribution of radio-elements around the reprocessing plant and to identify the mode of transfers, to determine the deposition rates on soil and vegetation in order to precise the transfer model of radio-element in plants. Three experiments in terrestrial environment with sampling of a bioindicator like furze has done in 1997, 1998 and 1999. In 2000, during TE-SEA cruise with the Research Vessel (RV) "Côtes de la Manche", the specific objective was to determine if there was 14C transfer as CO2 between sea to land.
© EDP Sciences, 2002
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