AC600二次侧非能动系统余热排出特性研究

THE HEAT REMOVAL STUDY OF AC600 PASSIVE SYSTEM

余热排出实验共获得１６６组稳态实验数据．数据表明，在本参数范围内，当气温为６－２３℃、冷热芯高差１１ｍ时，只要风速不小于１．５ｍ／ｓ，即可通过自然循环流动带走堆芯衰变功率．风速、功率和阀门开度的快速变化扰动对系统的稳定运行无大的影响，即系统运行对这些快速小扰动有一定的“容忍性”．通过引入系统特征参数建立了分析模型，本文得出含经验系数的自然循环流量等半经验公式．与实验数据比较，９８．８％的数据点偏差小于±１５％．

Total sets of 166 experimental data on steady state have been obtained. The experimental data shows that core residual heat can be removed through nature circulation underthe condition of circumstance temperature 6-23℃ and Lth of 11m, as long as wind-speedhigher than 1.5m/s in the test parameter scope. Experiment results illustrate also that shortdisturbance of wind-speed, power and valve opening had no significant impact on naturecirculation, which implicates the system seems to tolerate to these disturbance.A correlation of two-phase nature circulation flow rate is derived from constitutive equa-nons by using of specific system parameters and several semi--empiric formulas are obtained.Compared with the measuring data, the deviation of 98.8% data points is within 15%.