一条给水管线破裂后的辅助给水系统供水试验分析

Experimental Analysis of Water Supply of Auxiliary Feed Water System after Breakup of One Feed Water Line

本项试验是方家山核电机组调试大纲项目,主要验证在一条给水管线破裂后辅助给水系统供水时,从破口处的总流量不能超过250 m3/h,向2台完好蒸汽发生器(SG)中的每一台供应的给水流量不能低于45 m3/h。难点在于试验中不会有破口,无法直接得到仪表测量流量数据。于是建立模型,分析破口事故时辅助给水泵的运行工作点,通过正常供水试验数据拟合模型未知参数,最终根据工作点参数计算出破口与正常管线给水流量,综合分析得出破口时的给水数据,满足验收准则要求。

This test is one of the projects specified in the commissioning program for Fangjiashan nuclear power units, which is mainly to verify that when the water is supplied by the auxiliary feed water system with one broken feedwater line, the total flow from the break shall not be more than 250 m3/h, and the feed water flow to each of two intact steam generator(SG) shall not be below 45 m3/h. The difficulty lies in the fact that there will be no break in the test, and no flow data can be measured directly. A model is established to analyze the operation point of the auxiliary feedwater pump during the breakup accident, and fit the unknown parameters in the model with the data from normal tests. And then we can calculate the water supply flows to the breakup and normal lines with all the operation point data. Analysis shows that the water supply data meets the requirements of the acceptance criteria.