乏燃料贮存格架热工水力分析

The Thermal Hydraulic Analysis of Spent Fuel Storage Framework

通过计算流体力学的方法对新型国产乏燃料贮存格架进行热工水力分析,评估新型CPR乏燃料贮存格架在乏燃料池中的局部热工性能,计算在最大水力阻力下,包含放热量最大的乏燃料组件的格架贮存单元的局部最高温度。同时,经过理论计算分析了乏燃料池失去冷却水的极端工况下,乏燃料池的沸腾时间和贮存格架裸露时间。数值计算应用CFX流体分析软件,基于多孔介质模型完成计算分析。分析结果表明乏燃料池局部最高温度低于当地压力下水的饱和温度,满足格架的应用要求;在功率运行工况下失去冷却水,乏燃料水池沸腾时间足以用于采取有效措施应对极端工况。

By the method of computational fluid dynamics to study the heat-transfer characteristic of a new type of domestic spent fuel storage framework. Evaluate the local thermal performance of the new CPR spent fuel storage framework in the spent fuel pool. Study local maximum temperature of the spent fuel storage framework storage unit under the maximum hydraulic resistance calculation and the maximum heat quantity of spent fuel component. Calculated the spent fuel pool boiling time and storage framework exposed time at extreme conditions of lose cooling water. A computational tool provided is CFX fluid analysis software, based on the porous medium model. Analysis results show that the spent fuel pool local maximum temperature is lower than the local pressure saturation temperature of the water, satisfy the application requirement of the framework. When loss of cooling water in power operating condition, the spent fuel pool boiling time is sufficient to take effective measures to cope with the extreme conditions.