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首页> 外文期刊>Journal of Environmental Radioactivity >Tritium (~3H) as a tracer for monitoring the dispersion of conservative radionuclides discharged by the Angra dos Reis nuclear power plants in the Piraquara de Fora Bay, Brazil
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Tritium (~3H) as a tracer for monitoring the dispersion of conservative radionuclides discharged by the Angra dos Reis nuclear power plants in the Piraquara de Fora Bay, Brazil

机译：t（〜3H）作为示踪剂，用于监测巴西比拉夸拉德福拉湾Angra dos Reis核电厂释放的保守放射性核素的扩散

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摘要

Presently, two nuclear power plants operate in Brazil. Both are located at Itaorna beach, Angra dos Reis, approximately 133 km from Rio de Janeiro city. The reactor cooling circuits require the input of seawater, which is later discharged through a pipeline into the adjacent Piraquara de Fora Cove. The radioactive effluents undergo ion-exchange treatment prior to their release in batches, causing the enrichment of ~3H relative to other radionuclides in the discharged waters. Under steady state conditions, the ~3H gradient in the Piraquara de Fora waters can be used to determine the dependence of the dilution factor on the distance from the discharge point. The present work describes experiments carried out at the reactor site during batch release episodes, including time series sampling at the discharge point and surface seawater sampling every 250 m to a distance of 1250 m, after a double distillation, the ~3H concentration was measured by liquid scintillation counting applying a Quantulus liquid scintillation spectrometer. The obtained results showed a linear relationship between the ~3H concentration and distance from the discharge point At 1250 m from the discharge point a dilution index of 1:15 was measured which fits the expected value based on modeling.
机译：目前，巴西有两个核电厂。两者都位于安格拉杜斯雷斯的Itaorna海滩，距里约热内卢市约133公里。反应堆冷却回路需要输入海水，然后将海水通过管道排入相邻的比拉夸拉·德·福拉湾。放射性废水在分批释放之前要经过离子交换处理，从而使排放水中的〜3H相对于其他放射性核素富集。在稳态条件下，Piraquara de Fora水域中的〜3H梯度可用于确定稀释因子对距排放点距离的依赖性。本工作描述了批量释放期间在反应堆现场进行的实验，包括排放点的时间序列采样和每250 m至1250 m距离的地表海水采样，经两次蒸馏后，〜3H浓度通过使用Quantulus液体闪烁光谱仪进行液体闪烁计数。获得的结果表明，〜3H浓度与距排放点的距离之间存在线性关系。在距排放点1250 m处，测得的稀释指数为1:15，这与基于模型的预期值相符。

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  • 来源
    《Journal of Environmental Radioactivity》 |2014年第10期|169-173|共5页
  • 作者

    Franciane de Carvalho Gomes; Jose Marcus Godoy; Zenildo Lara de Carvalho; Elder Magalhaes de Souza; Jose Ivan Rodrigues Silva; Ricardo Tadeu Lopes;

  • 作者单位

    Programa de Engenharia Nuclear, COPPE/UFRJ, Cidade Universitaria, Caixo Postal 68.509, 21945-970 Rio de Janeiro, Brazil;

    Instituto de Radioprotecao e Dosimetria (IRD), Caixa Postal 37750, Barra da Tijuca, 22783-127 Rio de Janeiro, Brazil,Departamento de Quimica, Pontificia Universidade Catolica do Rio de Janeiro (PUC-Rio), Rua Marques de Sao Vicente 225,22453-900 Rio de Janeiro, Brazil;

    Instituto de Radioprotecao e Dosimetria (IRD), Caixa Postal 37750, Barra da Tijuca, 22783-127 Rio de Janeiro, Brazil;

    Instituto de Radioprotecao e Dosimetria (IRD), Caixa Postal 37750, Barra da Tijuca, 22783-127 Rio de Janeiro, Brazil;

    Instituto de Radioprotecao e Dosimetria (IRD), Caixa Postal 37750, Barra da Tijuca, 22783-127 Rio de Janeiro, Brazil;

    Programa de Engenharia Nuclear, COPPE/UFRJ, Cidade Universitaria, Caixo Postal 68.509, 21945-970 Rio de Janeiro, Brazil;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tritium; Effluents; CNAAA; Piraquara de Fora Cove; Brazil;

    机译：氚;废水;CNAAA;Piraquara de Fora Cove;巴西;

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