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Transfer of Tritium Released into the Marine Environment by French Nuclear Facilities Bordering the English Channel

机译:由与英吉利海峡接壤的法国核设施向海洋环境释放的of的转移

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摘要

Controlled amounts of liquid tritium are discharged as tritiated voter (HTO) by the nuclear industry into the English Channel. Because the isotopic discrimination between 3H and H is small, organically bound tritium (OBT) and HTO should show the same T/H ratio under steady-state conditions. We report data collected from the environment in the English Channel. Tritium concentrations measured in seawater HTO, as well as in biota HTO and OBT, confirm that tritium transfers from HTO to OBT result in conservation of the T/H ratio (ca. 1 × 10~(-16)). The kinetics of the turnover of tritium between seawater HTO, biota HTO, and OBT was investigated. HTO in two algae and a mollusk is shown to exchange rapidly with seawater HTO. However, the overall tritium turnover between HTO and the whole-organism OBT is a slow process with a tritium biological half-life on the order of months. Nonsteady-state conditions exist where there are sharp changes in seawater HTO. As a consequence, for kinetic reasons, the T/H ratio in OBT may deviate transiently from that observed in HTO of samples from the marine ecosystem. Dynamic modeling is thus more realistic for predicting tritium transfers to biota OBT under nonsteady-state conditions.
机译:核工业将受控量的液态industry作为as化投票者(HTO)排放到英吉利海峡。由于3H和H之间的同位素分辨力很小,因此在稳态条件下有机结合的tri(OBT)和HTO应该显示出相同的T / H比。我们在英吉利海峡报告从环境中收集的数据。在海水HTO以及生物区系HTO和OBT中测得的concentrations浓度,证实了from从HTO向OBT的转移导致了T / H比的守恒(约1×10〜(-16))。研究了海水HTO,生物区系HTO和OBT之间of的转化动力学。两种藻类和软体动物中的HTO与海水HTO迅速交换。但是,HTO和整个有机物OBT之间的总tri转化是一个缓慢的过程,a生物半衰期约为数月。海水HTO发生急剧变化时,存在非稳态条件。因此,出于动力学原因,OBT中的T / H比可能会暂时偏离海洋生态系统样品的HTO中观察到的T / H比。因此,动态模型对于预测predict在非稳态条件下向生物群OBT的转移更为现实。

著录项

  • 来源
    《Environmental Science & Technology》 |2013年第12期|6696-6703|共8页
  • 作者单位

    Institut de Radioprotection et de Surete Nucleaire Laboratoire de Radioecologie de Cherbourg-Octeville, IRSN/PRP-ENV/SERIS, Rue Max Pol Fouchet, BP 10, 50130 Cherbourg Octeville, France;

    Institut de Radioprotection et de Surete Nucleaire Laboratoire de Radioecologie de Cherbourg-Octeville, IRSN/PRP-ENV/SERIS, Rue Max Pol Fouchet, BP 10, 50130 Cherbourg Octeville, France;

    Institut de Radioprotection et de Surete Nucleaire Laboratoire de Radioecologie de Cherbourg-Octeville, IRSN/PRP-ENV/SERIS, Rue Max Pol Fouchet, BP 10, 50130 Cherbourg Octeville, France;

    Institut de Radioprotection et de Surete Nucleaire Laboratoire de Radioecologie de Cherbourg-Octeville, IRSN/PRP-ENV/SERIS, Rue Max Pol Fouchet, BP 10, 50130 Cherbourg Octeville, France;

    Institut de Radioprotection et de Surete Nucleaire Laboratoire de Radioecologie de Cherbourg-Octeville, IRSN/PRP-ENV/SERIS, Rue Max Pol Fouchet, BP 10, 50130 Cherbourg Octeville, France;

    Laboratoire de Mesure de la Radioactivite dans l'Environnement, IRSN/PRP-ENV/STEME, Bois des Rames - Bat 501, 91400 Orsay, France;

    Institut de Radioprotection et de Surete Nucleaire Laboratoire de Radioecologie de Cherbourg-Octeville, IRSN/PRP-ENV/SERIS, Rue Max Pol Fouchet, BP 10, 50130 Cherbourg Octeville, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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