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首页> 外文期刊>Radiation Protection Dosimetry >EMISSION RATE ESTIMATION THROUGH DATA ASSIMILATION OF GAMMA DOSE MEASUREMENTS IN A LAGRANGIAN ATMOSPHERIC DISPERSION MODEL
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EMISSION RATE ESTIMATION THROUGH DATA ASSIMILATION OF GAMMA DOSE MEASUREMENTS IN A LAGRANGIAN ATMOSPHERIC DISPERSION MODEL

机译：通过拉格朗日大气色散模型中伽马剂量测量的数据同化来估算发射率

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摘要

This paper presents an efficient algorithm for estimating the unknown emission rate of radionuclides in the atmosphere following a nuclear accident. The algorithm is based on assimilation of gamma dose rate measured data in a Lagrangian atmospheric dispersion model. Such models are used in the framework of nuclear emergency response systems (ERSs). It is shown that the algorithm is applicable in both deterministic and stochastic modes of operation of the dispersion model. The method is evaluated by computational simulations of a 3-d field experiment on atmospheric dispersion of Ar emitted routinely from a research reactor. Available measurements of fluence rate (photons flux) in air are assimilated in the Lagrangian dispersion model DIPCOT and the ~(4l)Ar emission rate is estimated. The statistical analysis shows that the model-calculated emission rates agree well with the real ones. In addition the model-predicted fluence rates at the locations of the sensors, which were not used in the data assimilation procedure are in better agreement with the measurements. The first evaluation results of the method presented in this study show that the method performs satisfactorily and therefore it is applicable in nuclear ERSs provided that more comprehensive validation studies will be performed.
机译：本文提出了一种有效的算法，用于估算核事故后大气中放射性核素的未知发射率。该算法基于在拉格朗日大气扩散模型中对伽玛剂量率测量数据的同化。此类模型用于核应急系统（ERS）的框架中。结果表明，该算法适用于色散模型的确定性和随机操作模式。该方法通过对研究堆常规排放的Ar的大气弥散的3-d现场实验的计算模拟进行评估。拉格朗日色散模型DIPCOT吸收了空气中通量率（光子通量）的可用测量值，并估算了〜（4l）Ar发射率。统计分析表明，模型计算出的排放率与实际值吻合良好。此外，在模型模型预测的传感器通量率（未在数据同化过程中使用）与测量结果更好地吻合。这项研究中提出的方法的第一个评估结果表明，该方法性能令人满意，因此，只要进行更全面的验证研究，该方法就可应用于核ERS。

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  • 来源
    《Radiation Protection Dosimetry》 |2012年第1期|p.34-44|共11页
  • 作者

    V Tsiouri; I. Kovalets; S. Andronopoulos; J. G. Bartzis;

  • 作者单位

    Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection,NCSR 'Demokritos', 15310 Agia Paraskevi Attikis, Athens, Greece,Department of Mechanical Engineering, University of Western Macedonia, Bakola and Sialvera str.,50100 Kozani, Greece;

    Department of Environmental Modeling, Institute of Mathematical Machine and System Problems,National Academy of Sciences of Ukraine, pr. Glushkova-42, Kiev 03187, Ukraine;

    Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection,NCSR 'Demokritos', 15310 Agia Paraskevi Attikis, Athens, Greece;

    Department of Mechanical Engineering, University of Western Macedonia, Bakola and Sialvera str.,50100 Kozani, Greece;

  • 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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