Distribution and behaviour of transuranic elements in the physical and biological compartments of the channel french shore
Identifieur interne : 002877 ( Main/Exploration ); précédent : 002876; suivant : 002878Distribution and behaviour of transuranic elements in the physical and biological compartments of the channel french shore
Auteurs : P. Germain [France] ; P. Miramand [France]Source :
- Nuclear Instruments and Methods In Physics Research [ 0167-5087 ] ; 1984.
Abstract
Biological samples (algae, suspension feeders molluscs living in contact with sediments, annelids), sediments and sea water were taken at 5 stations along the Channel shore from 1978 to 1981 in order to determine 239+240Pu, 238Pu, 241Am and 244Cm levels. In Northern Cotentin, radioactivity levels for 239+240Pu, 238Pu and 241Am were respectively about 1–10, 0.5–7 and 1–19 pCi kg−1 fresh weight in biological samples, 24–90, 11–28 and 24–31 pCi kg−1 dry weight in sediments, 1–7, 5–40 and 2–15 fCi 1−1 in sea water. For stations far from the La Hague outlet (Seine river and Mont Saint Michel bays) levels for 239+240Pu, 238Pu and 241Am were respectively about 0.3–5, 0.1–2 and 0.2–3 pCi kg−1 fresh weight in biological samples, 30–80, 5–26 and 14–40 pCi kg−1 dry weight in sediments, and 1–, 3–4 and 3–8 fCi 1−1 in sea water. Labelling of industrial wastes was demonstrated by the values of the 238Pu/239+240Pu ratios. The evolution of plutonium isotopes in sea water and in the other environmental compartments and the bio-availability of americium are discussed. Sediment-animal transfers are quantified and their processes specified. An assessment of plutonium and americium hazards from ingestion of molluscs shows that the ingested activity represents 1.1×10−4 only of the ALI (ingestion) recommended by ICRP for members of the public.
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DOI: 10.1016/0167-5087(84)90699-9
Affiliations:
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In Northern Cotentin, radioactivity levels for 239+240Pu, 238Pu and 241Am were respectively about 1–10, 0.5–7 and 1–19 pCi kg−1 fresh weight in biological samples, 24–90, 11–28 and 24–31 pCi kg−1 dry weight in sediments, 1–7, 5–40 and 2–15 fCi 1−1 in sea water. For stations far from the La Hague outlet (Seine river and Mont Saint Michel bays) levels for 239+240Pu, 238Pu and 241Am were respectively about 0.3–5, 0.1–2 and 0.2–3 pCi kg−1 fresh weight in biological samples, 30–80, 5–26 and 14–40 pCi kg−1 dry weight in sediments, and 1–, 3–4 and 3–8 fCi 1−1 in sea water. Labelling of industrial wastes was demonstrated by the values of the 238Pu/239+240Pu ratios. The evolution of plutonium isotopes in sea water and in the other environmental compartments and the bio-availability of americium are discussed. Sediment-animal transfers are quantified and their processes specified. An assessment of plutonium and americium hazards from ingestion of molluscs shows that the ingested activity represents 1.1×10−4 only of the ALI (ingestion) recommended by ICRP for members of the public.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Basse-Normandie</li><li>Région Normandie</li></region><settlement><li>Cherbourg</li></settlement></list><tree><country name="France"><region name="Région Normandie"><name sortKey="Germain, P" sort="Germain, P" uniqKey="Germain P" first="P." last="Germain">P. Germain</name></region><name sortKey="Miramand, P" sort="Miramand, P" uniqKey="Miramand P" first="P." last="Miramand">P. Miramand</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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