低熔点金属与冷却剂相互作用的数值模拟

为了更好的验证钠冷快堆堆芯解体事故分析程序,需要对熔融燃料与冷却剂的相互作用(FCI)现象进行模拟与验证。对于钠冷快堆而言,采用钠作为冷却剂的FCI实验较难开展,对实验条件要求极高。因此本研究利用锡-水相互作用实验进行机理研究和程序验证。本文通过对实验的模拟来研究发生在核反应堆严重事故情况下的燃料与冷却剂相互作用过程。采用基于泰勒不稳定性的水力学细粒化模型,对低熔点金属与冷却剂相互作用过程进行数值计算和预测。计算结果表明,水力学模型较好地模拟了低熔点金属与冷却剂相互作用过程。

In order to better verify the sodium-cooled fast reactor core disruptive accident analysis code,the interaction between molten fuel and coolant(FCI)phenomenon needs to be simulated and verified.For sodium-cooled fast reactors,FCI experiments using sodium as a coolant are difficult to carry out,and the experimental conditions are extremely high.Therefore,this study used the tin-water interaction experiment to conduct mechanism research and code verification.In this paper,the simulation of the experiment is used to study the interaction between fuel and coolant in the case of a serious accident in a nuclear reactor.The numerical calculation and prediction of the interaction process between low melting point metal and coolant were carried out by using the hydraulic granulation model based on Taylor instability.The calculation results show that the hydraulic model predicts well the interaction progress between the low melting point metal and the coolant.