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A theoretical study of cyclon-effect in PWR downcomer during a LOCA blowdown

机译:LOCA排污期间压水堆下降管中旋风效应的理论研究

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摘要

The current strategy based on the use of so-called cross-junction, allows partial modeling during blow-down episodes driven by larger-scale (flow features such as helical profile) in downcomers nuclear reactors. However a subtle but significant effect may appear by the combined action of two factors: on the one hand high azimuthal flow, on the other hand the intrinsic curvature of downcomer, and additionally in presence of a two-phases (vapor-liquid) a cyclon-effect can manifest. The present paper is a theoretical analysis of a possible cyclon-effect during blowdown episodes that allows a qualitative estimate of the impact on the calculations.
机译:当前基于使用所谓的交叉结的策略,允许在降液管核反应堆的大规模(流动特征,如螺旋形)驱动的放空事件期间进行局部建模。然而,两个因素的综合作用可能会产生微妙而显着的影响:一方面是高方位角气流,另一方面是降液管的固有曲率,另外,在存在两相(气液)旋流器的情况下效果可以体现出来。本文是对排污期间可能产生的气旋效应的理论分析,可以对影响的定性估计。

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  • 来源
    《Annals of nuclear energy》 |2009年第8期|1294-1297|共4页
  • 作者

    F.J. Arias; F.Reventos;

  • 作者单位

    Department of Physics and Nuclear Engineering, Technical University of Catalonia, (UPC), Spain;

    Department of Physics and Nuclear Engineering, Technical University of Catalonia, (UPC), Spain Institute of Energy Technologies, Technical University of Catalonia, (UPC), Spain;

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