Influence of releases of 129I and 137Cs from European reprocessing facilities in Fucus vesiculosus and seawater from the Kattegat and Skagerrak areas

Concentration factors and biological half-lives for the dynamic modelling of radionuclide transfers to marine biota in the English Channel

“…At a greater distance, depending on the proportion of I-129 still bioavailable for brown seaweed, the CF values should be scaled down accordingly. Nevertheless, the CF value of 10,000 reported by Gomez-Guzman et al, (2014) in Fucus from Kattegat (Denmark), far away downstream from the outlet of the RP (no other source of I-129 exists to our knowledge), was consistent with our recommended value. Investigating the fate of the chemical speciation of I-129 released by the RP thoroughly is a prerequisite before we can consolidate the validity of our transfer modelling process in brown seaweed.…”

“…We raised the issue of I-129 chemical speciation in the marine environment of the RP outlet and we outlined the limited validity of our recommended CF value within 50 Km from the RP. Although our CF value in wrack was consistent with the value reported by Gomez-Guzman et al, (2014) in Kattegat, the fate of I-129 released by the ORANO La Hague RP obviously needs further investigation. For Antimony, our derived CF are below those reported in TRS 479, this was surprising since the latter were mainly derived from data from IRSN in the English Channel.…”

Food safety hazards in the European seaweed chain

“…Despite literature on such incidents, seaweeds can be used as bioindicators of radionuclide concentrations in the marine environment. Because seaweed is reported to have a high uptake of I from seawater, it is an important bioindicator for Iodine‐129 ( 129 I; Gómez‐Guzmán et al., ).…”

“…Literature Data from Asia describing high radionuclide concentrations in seaweeds right after the Fukushima accidents showed a clear decrease over time toward low, stable concentrations within 0.5 to 5 years, clearly below the regulatory limit for radiocesium of 600 Bq/kg (Kawai et al, 2014;Wada et al, 2016;Wada et al, 2013). Data from Canada and Sweden also showed reasonably low concentrations of 129 I (44 to 575 × 10 9 atoms/g and 137 Cs [2 to 21 Bq/kg]) in F. vesiculosus samples (Gómez-Guzmán et al, 2014).…”

Accelerator Mass Spectrometry (AMS) in Radioecology

“…It has also been studied by the CNA group. Results in seaweed and water samples taken in the Baltic area were presented in Gómez-Guzmán et al 2013 andGómez-Guzmán et al 2014. It was possible to show that the main contributionsto this area comes from the releases of Sellafield and La Hague and that the contribution of 129 I from Chernobyl was not significant.…”