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针对脉冲反应堆的特点 ,建立了脉冲反应堆失水事故的数学模型 ,编制了脉冲堆失水事故仿真分析软件XPRLOCA。该软件具有可视化的图形人 机界面接口和实时仿真功能。利用XPR LOCA对西安脉冲堆的失水事故进行了分析计算。失水情况下的分析计算结果表明 :当破口标高低于堆芯下栅板、破口直径不大于 2 6mm时 ,燃料温度和包壳应力均低于安全限值 ;破口标高高于堆芯下栅板或破口直径大于 2 6mm时 ,必须采取应急补水措施 ;在失水情况下 ,应确保燃料最高温度低于 90 0℃。
According to the characteristics of pulse reactor, the mathematical model of pulse reactor loss of water was established and XPRLOCA, a simulation analysis software of pulse reactor loss of water accident, was prepared. The software has a visual graphical human-machine interface and real-time simulation interface. The XPR LOCA was used to analyze and calculate the water loss accident in Xi’an pulse stack. The results of the analysis and calculation under the conditions of water loss show that the fuel temperature and the cladding stress are both lower than the safety limits when the fracture elevation is lower than the grid under the core and the fracture diameter is not more than 26 mm; Under the core grid or breaking diameter greater than 26mm, must take emergency water replenishment measures; in case of water loss, should ensure that the fuel maximum temperature is lower than 90 0 ℃.