【摘要】 针对全厂断电事故中主回路自然循环现象的试验模拟问题,基于自然循环试验装置及其运行参数,建立了数值分析模型,采用功率积分、参数拟合等方式对自然循环试验初始条件的实现过程进行了研究。结果表明:采用功率积分或参数拟合等运行方式均可在自然循环试验装置中实现试验初始条件及状态;与参数拟合相比,积分功率法中系统参数的瞬态效应更为明显,其对应的主回路平均温度、系统压力和循环流量更高。更多还原

【Abstract】 Aiming at the experimental simulation of natural circulation phenomenon occurring in reactor coolant system during blackout accident, based on the natural circulation test facility(NCTF) and its operating parameters, a numerical model for analysis is established. The realization process of initial conditions for natural circulation test is studied by means of power integration method(PIM) and parameters fitting method(PFM).The results show that the initial conditions and state of the natural circulation test can be achieved in NCTF by PIM or PFM. Besides, compared with PFM, the transient effect of system parameters in PIM is more obvious,and the corresponding average temperature of main loop, system pressure and circulation flow rate are higher.更多还原