caa a22 4500 469111542 CHVBK 20180323133112.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF02037434 doi (NATIONALLICENCE)springer-10.1007/BF02037434 Distribution and behaviour of99Tc,237Np,239,240Pu, and241Am in the coastal and estuarine sediments of the Irish Sea [Elektronische Daten] [C. Kim, S. Morita, R. Seki, Y. Takaku, N. Ikeda, D. Assinder] Intertidal coastal and estuarine sediments from 24 sites in the Irish Sea have been analyzed for99Tc,237Np,238Pu,239,240Pu and241Am. The237Np activity and239Pu/240Pu ratio were measured simultaneously by ICP-MS, and99Tc was determined by HR-ICP-MS which is ten times more sensitive than Q-ICP-MS. The activities of99Tc,237Np,239,240Pu and241Am were distributed over a wide range of 1.5-70.5, 0.01-13.3, 2.3-1589, 2.6-1894 Bq/kg, respectively. Activities of these radionuclides decreased exponentially with distance from the Sellafield source. The241Am/239,240Pu and237Np/239,240Pu ratios were almost constant with distance from the Sellafield. This result suggests that the distribution and behavior of Np and Pu are controlled by complicated factors such as the influence of transport, the variation with time of Np/Pu ratio in the Sellafield discharges and sedimentary mixing processes in the Irish Sea. Akadémiai Kiadó, 1992 Kim C. Department of Chemistry, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut Morita S. Department of Chemistry, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut Seki R. Marubun Co., 8-1 Odenma-cho, Chuo-ku, 170, Nihonbashi, Tokyo, (Japan) aut Takaku Y. Marubun Co., 8-1 Odenma-cho, Chuo-ku, 170, Nihonbashi, Tokyo, (Japan) aut Ikeda N. Department of Chemistry, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut Assinder D. School of Ocean Science, University College of North Wales, Menai Bridge, LL59 5EY, Anglesey, Gwynedd, (U.K.) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 156/1(1992-01-01), 201-213 0236-5731 156:1<201 1992 156 10967 https://doi.org/10.1007/BF02037434 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02037434 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim C. Department of Chemistry, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut NATIONALLICENCE 700 1- Morita S. Department of Chemistry, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut NATIONALLICENCE 700 1- Seki R. Marubun Co., 8-1 Odenma-cho, Chuo-ku, 170, Nihonbashi, Tokyo, (Japan) aut NATIONALLICENCE 700 1- Takaku Y. Marubun Co., 8-1 Odenma-cho, Chuo-ku, 170, Nihonbashi, Tokyo, (Japan) aut NATIONALLICENCE 700 1- Ikeda N. Department of Chemistry, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut NATIONALLICENCE 700 1- Assinder D. School of Ocean Science, University College of North Wales, Menai Bridge, LL59 5EY, Anglesey, Gwynedd, (U.K.) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 156/1(1992-01-01), 201-213 0236-5731 156:1<201 1992 156 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer