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针对中低压自然循环系统静态流量漂移现象的特点,利用大型系统热工程序CATHARE对不同压力和阻力分布下的自然循环系统进行模拟分析,探索静态流量漂移的影响因素。分析结果表明,同等过冷度条件下,低压更易诱发静态流量漂移;加热段出口阻力分布对阻力影响较大。同时,结合计算数据分析系统静态分岔及迟缓现象。
Aiming at the characteristics of static flow drift of natural circulation system in low and medium pressure, the large-scale thermal engineering program CATHARE was used to simulate the natural circulation system under different pressure and resistance distribution and to explore the influencing factors of static flow drift. The analysis shows that under the same degree of undercooling, the low pressure is more likely to induce the static flow drift. The distribution of the outlet resistance of the heating section has a great influence on the resistance. At the same time, the static bifurcation and sluggishness of the system are analyzed in combination with the calculation data.