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球床高温气冷堆燃料颗粒中放射性核素的累积释放份额研究

杨辰 房超 张建 曹建主

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球床高温气冷堆燃料颗粒中放射性核素的累积释放份额研究

杨辰, 房超, 张建, 曹建主

Study on cumulative fractional release of radionuclides in HTGR fuel particles

Yang Chen, Fang Chao, Zhang Jian, Cao Jian-Zhu
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  • 本文利用Fick扩散定律,给出经典方法和改进的两种累积释放份额的严格数学表达式,并分析与之相关的穿透时间的物理内涵,并分别用以上两种方法计算 137Cs,90Sr,110mAg三种重要放射性核素通过SiC层扩散的累积释放份额. 研究表明,传统的“穿透时间”概念并非放射性核素释放到SiC层外的时间,本文提出的改进方法可以更准确的描述放射性核素在燃料元件中的输运和扩散行为.
    During high-temperature gas refrigeration reactor (HTGR) operation, SiC in the fuel particles is the key structure for stopping radionuclides diffusing from the particles. Researchers put forward the concept of breakthrough time, which is the time of a large amount of radionuclides released through SiC from the particles, for the consideration of HTGR safety. However, this concept is not so accurate. This paper gives a strict expression of cumulative fractional release interims of classic and improved methods, and also analyses the relevant physical content of breakthrough time in the use of Fick’s law of diffusion. By computing the cumulative fractional release of three kinds of important radionuclides 137Cs, 90Sr and 110mAg, and using the above two methods, we find that the traditional meaning of the physical quantity is not the time of radionuclides released from SiC. The improved method is more accurate for describing the release and transport condition of radionuclides in nuclear fuel particles.
    • 基金项目: 低维量子物理国家重点实验室开放研究基金(批注号:KF201302)、国家重大科技专项(批准号:ZX06901)和国家自然科学基金(批准号:11104156)资助的课题.
    • Funds: Project supported by the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics Physics (Grant No. KF201302), the National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant No. ZX06901), and the National Natural Science Foundation of China (Grant No. 11104156).
    [1]

    Fang C, Liu M L 2012 Acta Phys. Sin. 61 097802 (in Chinese) [房超, 刘马林 2012 物理学报 61 097802]

    [2]

    Wu Z X, Zhang Z Y 2004 Advanced Nuclear Power System and High-temperature Gas-cooled Reactor (First Edition) (Beijing: Tsinghua University Press) p22 (in Chinese) [吴宗鑫, 张作义 2004 先进核能系统和高温气冷堆(第1版) (北京: 清华大学出版社)第22页]

    [3]

    Cao Y, Cao J Z 2007 Atom. Ene. Sci. & Tec. 41 555 (in Chinese) [曹玥, 曹建主 2007 原子能科学技术 41 555]

    [4]

    IAEA-TECDOC-978 1997 International Atomic Energy Agency p446

    [5]

    Moormann R 2009 Kerntechnik. 74 8

    [6]

    Crank J 1956 The mathematics of diffusion (London: Oxford University Press) p24

    [7]

    Jost W 1960 Diffusion in solids, liquids, gases (3rd printing with addendum) (New York: Academic Press) p42

    [8]

    Carslaw H S, Jaeger J C 1959 Conduction of heat in solids (Oxford: Clarendon Press) p246

  • [1]

    Fang C, Liu M L 2012 Acta Phys. Sin. 61 097802 (in Chinese) [房超, 刘马林 2012 物理学报 61 097802]

    [2]

    Wu Z X, Zhang Z Y 2004 Advanced Nuclear Power System and High-temperature Gas-cooled Reactor (First Edition) (Beijing: Tsinghua University Press) p22 (in Chinese) [吴宗鑫, 张作义 2004 先进核能系统和高温气冷堆(第1版) (北京: 清华大学出版社)第22页]

    [3]

    Cao Y, Cao J Z 2007 Atom. Ene. Sci. & Tec. 41 555 (in Chinese) [曹玥, 曹建主 2007 原子能科学技术 41 555]

    [4]

    IAEA-TECDOC-978 1997 International Atomic Energy Agency p446

    [5]

    Moormann R 2009 Kerntechnik. 74 8

    [6]

    Crank J 1956 The mathematics of diffusion (London: Oxford University Press) p24

    [7]

    Jost W 1960 Diffusion in solids, liquids, gases (3rd printing with addendum) (New York: Academic Press) p42

    [8]

    Carslaw H S, Jaeger J C 1959 Conduction of heat in solids (Oxford: Clarendon Press) p246

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  • PDF下载量:  651
  • 被引次数: 0
出版历程
  • 收稿日期:  2013-05-14
  • 修回日期:  2013-09-22
  • 刊出日期:  2014-02-05

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