Study on the Dispersion of Radionuclides under Different Hydrological Conditions of Spent Fuel Shipping in Daya Bay

IF 1 4区工程技术 Q3 NUCLEAR SCIENCE & TECHNOLOGY Science and Technology of Nuclear Installations Pub Date : 2022-06-10 DOI:10.1155/2022/7265821

Liwei Chen, Wei Chen, Jiazhen Lin, Chunhua Chen, Yalin Luo, Longlong Tao

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引用次数: 1

Abstract

The radionuclide dispersion in coastal water is mainly controlled by the water flow and tidal effect. Tracing and analysis of radioactive pollutant dispersion in coastal water can predict distribution of radionuclide under marine transportation accident of spent fuel. In this work, factors such as continuous emission, radioactive decay, and water depth are considered, and a hydrodynamic model of radionuclide dispersion based on shallow water equations is established to simulate the dispersion of the radioactive pollutant in coastal waters under different hydrological conditions. As far as the characteristics of the radionuclide dispersion in coastal water are concerned, the simulation of pollutants by the hydrodynamic model is in good agreement with the work of Bailly du Bois et al., which validated the correctness of this model. The model has been applied to simulate the distribution of radionuclides in coastal water following a marine transport accident of spent fuel near Daya Bay Nuclear Power Plant in China. The simulation reveals that the distribution features are significantly affected by different hydrological conditions. In addition to limiting the diffusion range, the vortex effect can also cause the accumulation of radionuclides near the vortex, which helps to provide more practical information for nuclear emergency decision makers.

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不同水文条件下放射性核素在大亚湾乏燃料运输中的扩散研究

放射性核素在沿海水体中的扩散主要受水流和潮汐效应的控制。对放射性污染物在近海的扩散进行跟踪分析，可以预测乏燃料海上运输事故下放射性核素的分布。本文考虑了连续排放、放射性衰变和水深等因素，建立了基于浅水方程的放射性核素扩散水动力学模型，模拟了不同水文条件下放射性污染物在沿海水域的扩散。就放射性核素在沿海水中的扩散特性而言，流体动力学模型对污染物的模拟与Bailly du Bois等人的工作非常一致，验证了该模型的正确性。该模型已用于模拟中国大亚湾核电站附近乏燃料海上运输事故后沿海水中放射性核素的分布。模拟结果表明，不同水文条件对其分布特征有显著影响。涡流效应除了限制扩散范围外，还可以导致放射性核素在涡流附近积聚，这有助于为核应急决策者提供更实用的信息。

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来源期刊

Science and Technology of Nuclear Installations NUCLEAR SCIENCE & TECHNOLOGY-

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Science and Technology of Nuclear Installations is an international scientific journal that aims to make available knowledge on issues related to the nuclear industry and to promote development in the area of nuclear sciences and technologies. The endeavor associated with the establishment and the growth of the journal is expected to lend support to the renaissance of nuclear technology in the world and especially in those countries where nuclear programs have not yet been developed.