Flow Instability Analysis of Supercritical Water-Cooled Reactor CSR1000 based on Frequency Domain
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摘要: 针对中国超临界水冷堆(CSR1000)建立堆芯数学模型,开发基于频域法的超临界水冷堆流动不稳定性分析程序FREDO-CSR1000和基于时域法的超临界水冷堆流动不稳定性分析程序TIMDO。对程序进行初步验证后,使用其对CSR1000堆芯进行流动不稳定性分析计算,计算结果显示由频域法和时域法计算得到的稳定性边界图都明显分成2个区域,呈现倾斜的双L型,明显存在2个拐点,分别对应流量漂移和密度波振荡2种流动不稳定性现象。2种方法计算得到的CSR1000运行点都处于安全运行空间内,距离流动不稳定性边界较远。
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关键词:
- 中国超临界水冷堆(CSR1000) /
- 频域分析法 /
- 时域分析法 /
- 流动不稳定性
Abstract: Flow instability of Supercritical Water-cooled Reactor CSR1000 was studied and mathematics model of core in supercritical water-cooled reactor CSR 1000 was established.A code named FREDO-CSR1000（Frequency domain analysis of CSR1000） and a code named TIMDO（Time-Domain Method） have been developed to analyze the flow instability of Supercritical Water-cooled Reactor CSR1000 after the codes was verified.The results show that the shape of stability map obtained by the two different methods are very similar,both of which are divided into two regions,respectively corresponding to two types of flow instability,namely the flow drift and the density wave oscillation instability.Besides,it is also found that the operation points of CSR1000 calculated by the frequency domain method and time domain method are both in the safety operation region.,which are far away from the unstable region. -
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