首页> 外文期刊>Radiation Protection Dosimetry >ESTIMATION OF ANNUAL EFFECTIVE DOSE DUE TO NATURAL AND MAN-MADE RADIONUCLIDES IN THE METROPOLITAN AREA OF THE BAY OF CADIZ (SW OF SPAIN)
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ESTIMATION OF ANNUAL EFFECTIVE DOSE DUE TO NATURAL AND MAN-MADE RADIONUCLIDES IN THE METROPOLITAN AREA OF THE BAY OF CADIZ (SW OF SPAIN)

机译:西班牙加的斯湾大都市区天然和人工放射性核素引起的年度有效剂量估算

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摘要

In order to investigate the radiological hazard of naturally occurring radioactive material (NORM) and man-made ~(137)Cs radionuclide in the Bay of Cadiz, 149 samples of sediments have been analysed. Activity concentration in all the samples was determined using a HPGe detection system. Activity concentrations values of ~(226)Ra, ~(232)Th, ~(40)K and ~(137)Cs in the samples were 12.6 + 2.6 (2.5-40.6), 18.5±4.0 (2.8-73.4), 451±45 (105-1342) and 3.2 + 1.3 (0.2-16.0) Bq kg~(-1), respectively. Outdoor external dose rate due to natural and man-made radionuclides was calculated to be 35.79 + 1.69 (4.71-119.16) nGy h~(-1) and annual effective dose was estimated to be 43.89 ± 2.27 (5.78-146.14) μSv y~(-1). Results showed low levels of radioactivity due to NORM and man-made ~(137)Cs radionuclide in marine sediments recovered from the Bay of Cadiz (Spain), discarding any significant radiological risks related to human activities of the area. Furthermore, the obtained data set could be used as background levels for future research.
机译:为了调查加的斯湾天然放射性物质(NORM)和人造〜(137)Cs放射性核素的放射危害,已分析了149个沉积物样品。使用HPGe检测系统确定所有样品中的活性浓度。样品中〜(226)Ra,〜(232)Th,〜(40)K和〜(137)Cs的活性浓度值为12.6 + 2.6(2.5-40.6),18.5±4.0(2.8-73.4),451分别为±45(105-1342)和3.2 + 1.3(0.2-16.0)Bq kg〜(-1)。天然和人造放射性核素引起的室外外部剂量率经计算为35.79 + 1.69(4.71-119.16)nGy h〜(-1),年有效剂量估计为43.89±2.27(5.78-146.14)μSvy〜 (-1)。结果表明,从加拿大加的斯湾(西班牙)回收的海洋沉积物中,归因于NORM和人造〜(137)Cs放射性核素,放射性水平较低,从而丢弃了与该地区人类活动有关的任何重大放射风险。此外,获得的数据集可用作将来研究的背景水平。

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  • 来源
    《Radiation Protection Dosimetry》 |2012年第1期|p.60-70|共11页
  • 作者单位

    Departamento de Fisica Aplicada, Universidad de Cadiz, Av. De la Republica Saharaui s, 11510 Puerto Real, Cadiz, Spain;

    Departamento de Fisica Aplicada, Universidad de Cadiz, Av. De la Republica Saharaui s, 11510 Puerto Real, Cadiz, Spain;

    Departamento de Ciencias de la Tierra, Universidad de Cadiz, Av. De la Republica Saharaui s, 11510 Puerto Real, Cadiz, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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