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针对现有的一些大型电站系统分析程序在处理非能动余热排出系统不方便的问题 ,开发了一种简便的分析工具— SGSPRHR程序 ,用来分析全厂断电事故发生后反应堆3个回路的瞬态行为。该程序对汽水回路使用一维漂移流模型 ,而对一回路和空气回路使用单相流体模型 ,采用非线性二阶算法求解刚性方程组。计算结果表明 :烟囱高度增加 ,空冷器面积增大 ,冷热芯高差增加均使系统的排热能力增强。计算结果与理论分析相一致。
In view of the inconvenience of some existing large-scale power station system analysis programs in handling passive residual heat removal system, a simple analytical tool SGSPRHR was developed to analyze the instantaneous response of the three reactors after the power failure of the whole plant State behavior. The program uses a one-dimensional drift flow model for the soda loop and a single-phase fluid model for the first loop and the air loop, and a nonlinear second-order algorithm to solve the rigid equations. The calculation results show that the height of the chimney increases, the area of the air cooler increases, and the increase of the height difference between the hot and cold cores both increases the heat removal capacity of the system. The calculation results are consistent with the theoretical analysis.