VVER型反应堆堆芯流量分配与组件冷却剂温升CFD分析

CFD Analysis of Flow Distribution of Reactor Core and Temperature Rise of Coolant in Fuel Assembly for VVER Reactor

摘要: 利用计算流体力学程序CFX对VVER-1000型反应堆三维流场进行模拟，并计算了热组件冷却剂的温升。结果表明，燃料组件流量分配系数最大值为1.12，最小值为0.92；热组件流量分配系数约为0.97；偏离工况条件下，热组件冷却剂温升均高于当前温升预警限值ΔT_t。该分析结果可为核电站运行中ΔT_t的设定提供参考。

Abstract: Flow field of VVER-1000 reactor core was investigated by using computational fluid dynamics code CFX, and the temperature rise of coolant in hot assembly was calculated. The results show that the maximum value of flow distribution factor is 1.12 and the minimum value is 0.92. The average value of flow distribution factor in hot assembly is 0.97. The temperature rise in hot assembly is higher than current warning limit value ΔT_t under the deviated operation condition. The results can provide reference for setting ΔT_t during the operation of nuclear power plant.