Synthèse des études radioécologiques annuelles menées dans l'environnement des centrales électronucléaires françaises depuis 1991

An extremely radioresistant green eukaryote for radionuclide bio-decontamination in the nuclear industry

“…Cobalt and silver represent 77 to 94% of the g-emitters released in liquid effluents of pressurized water nuclear reactors. 64 Silver also belongs to the highest toxic class of heavy metals with cadmium, surpassed only by mercury. 65,66 Values obtained in this work are among the upper values of the wide range of BCFs reported for these elements in microalgae, namely 1700-400 000 mL g À1 FW for silver 30,31,67 and 300-3300 mL g À1 FW or 40 000 mL g À1 dry weight (DW) for radiocobalt.…”

Long term decrease of 137Cs bioavailability in French pastures: Results from 25 years of monitoring

“…918, 45.589 1993-2016 1993-2013 1993-2016 14.5- 1992-2016 1998-2016 1992-2016 8.9-32.0 0.1-1.1 0.01-0.2 Creys-Malville CRM 5. 467, 45.800 1995-2016 1996-2016 1996-2016 8.4- Astori et al, 199928.8e (21.5) 1991-2004(1993) BLF 7.7c (21.5) 1992-2004 BUG Roussel-Debet et al, 20076.7c (14.2) 1991-2004(2005) CAT 5.1c (13.1) 1992-2004(1992) CHO 7.3c (12.0) 1992) CRM (18.7)d (1992 France (This study) (a)These values have been averaged over several monitoring plots, locations, soil types or soil textures thus they may differ from those found directly in the cited papers. The two given numbers are the ninety-five percent -------------------1 -----------…”

“…-Debet et al, 2007). Additionally to these depositions, a very minor and negligible amount was also received after the Fukushima accident in spring 2011 (Masson et al, 2011;Parache et al, 2011).The contribution of Cs originating from nuclear reactor releases to the total Cs content in terrestrial environment can be ignored (Duffa et al, 2004). All sites are used for cow grazing and therefore grass and cow's milk sampled from these sites are used to assess the transfer of Cs from soil to grass and from grass to milk.…”

Evaluation of semi-mechanistic models to predict soil to grass transfer factor of 137Cs based on long term observations in French pastures

“…The 26 other soil samples were taken in the vicinity of some nuclear power plants (the soil samples not originated from Puy de Dôme or Jura are denoted NPP hereafter), in the course of radiological monitoring programs carried out by IRSN. The contribution of the NPP releases to the contamination of soils in these areas was considered negligible (Duffa et al, 2004), the main sources remaining, as underlined before, the Chernobyl accident and the nuclear tests. In addition to the soil physicochemical properties, Cs activity concentration was determined in the upper soil (0-5 cm) and grass (stems and shoots) from which we calculated the transfer factors.…”