快堆蒸汽发生器大泄漏钠-水反应计算

Calculation of Large Leak Sodium/Water Reaction in Steam Generator of LMFBR

采用一维特征线方法建立了快堆蒸汽发生器单管发生双端断裂情况下 ,水从破裂传热管流出的泄漏率计算模型和钠 水反应气泡从球状到柱状的变温绝热生长模型。根据断裂处氢气压力变化 ,并考虑管内流体的压缩性建立了水的泄漏率模型。对分别发生在单相水区 ,单相蒸汽区和两相汽水混合区的大泄漏钠 水反应进行瞬态计算和定性分析。结果说明 。

Two models were developed, one for calculating the leakage rate of water from heat transfer tubes due to one broken double ended guillotine tube in the steam generator of LMFBR using the one dimensional method of characteristics, and anotherone for temperature, adiabatic spherical to columnar hydrogen bubble growth model in large sodium water reaction. The hydrogen pressure transient in the break point and the compressibility of water/steam in the tubes are taken into account in the water leakage rate model. Pressure transient in the sodium water reaction in case of large leakage is calculated and analyzed qualitatively for the leakage at the sections of subcooled water, superheated water and two phase water in heat transfer tube, respectively.The result shows that the impact of leakeage on the secondary loop varies from the break point on the heat transfer tube.