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选择计算流体动力学(CFD)为模拟手段,建立快堆一回路钠池的三维闭式一体化CFD模型,对一回路中主要部件进行模拟,其中中间热交换器、独立热交换器、堆芯、主泵采用附加源项法进行模拟,得到中国实验快堆(CEFR)额定功率稳态运行时整个流场的三维速度场与温度场。计算值同CEFR设计值进行比较,结果符合预期,证明了模型的合理性。计算结果表明,钠池较明显地分为温度较低的冷钠池和温度较高的热钠池2个部分,热钠池温差较大,冷热流体搅混现象明显;同时冷钠池、热钠池不同高度的平均温度都很接近,说明分隔冷热钠池的热屏蔽效果较好。
Select computational fluid dynamics (CFD) as a simulation tool to establish a three-dimensional closed-integrated CFD model of the sodium pool of the fast reactor first loop, the main components of a loop simulation, including intermediate heat exchanger, independent heat exchanger, core , The main pump is simulated with additional source term method, and the 3D velocity field and temperature field of the entire flow field at rated power of China Experimental Fast Reactor (CEFR) are obtained. The calculated value is compared with the CEFR design value, the result is in line with expectation, which proves the rationality of the model. The results show that the sodium pool is obviously divided into two parts, the cold sodium pool and the hot sodium pool. The temperature difference between the hot sodium pool and the hot and cold pool is more obvious. The average temperature of the sodium pool at different heights are very close, indicating that the separation of hot and cold sodium pool heat shielding effect is better.