乏燃料池热管式被动散热系统开发研究  

Development and research of heat pipe-passive cooling system for spent fuel pool

作　　者：贺美娟 许辉 张红 He Meijuan;Xu Hui;Zhang Hong(School of Energy Science and Engineering,Nanjing Tech University,Jiangsu Nanjing,211800,China;Nanjing Forestry University,Jiangsu Nanjing,210018,China)

机构地区：[1]南京工业大学能源科学与工程学院,江苏南京211800 [2]南京林业大学,江苏南京210018

出　　处：《机械设计与制造工程》2024年第8期101-107,共7页Machine Design and Manufacturing Engineering

摘　　要：乏燃料池的长期有效冷却是核电站安全运行的重要一环,目前广泛使用的主动冷却方式在极端条件下存在安全隐患。基于分离式热管技术,对可应用于乏燃料池被动散热的热管换热器进行开发研究,提出工程应用结构方案,通过理论分析和数值模拟分析其可行性,并在冷侧自然对流条件下对换热器热管单元样机进行试验研究,结果表明:充液量对热管传热性能及温度分布有显著影响,热管存在最佳充液量;池内水流速的变化一定程度上影响热管冷凝段的温度分布;热管单元可有效控制乏燃料池水温,证明被动散热系统可满足乏燃料池长期被动散热的要求。Long-term effective cooling of spent fuel pools is crucial for the safe operation of nuclear power plants.The currently widely used active cooling method,however,may pose potential safety hazards under extreme conditions.In this paper,a heat pipe heat exchanger for passive heat dissipation in spent fuel pools is developed and researched based on technology of separate type heat pipe.Through theoretical and numerical simulation,the feasibility of the heat exchanger is analyzed,the engineering application structure scheme is proposed,and the prototype of the heat exchanger heat pipe unit is tested under the condition of natural convection on the cold side.The results indicate that the filling ratio significantly influences the heat transfer performance and temperature distribution of the heat pipe,and there exists an optimal filling ratio.The variation in water velocity within the pool moderately affects the temperature distribution of the heat pipe condensing section.The heat pipe unit effectively regulates the water temperature of the spent fuel pool,demonstrats that the passive cooling system meets the demands for long-term passive heat dissipation of the spent fuel pool.

关 键 词：乏燃料池 被动散热 分离式热管 数值模拟 试验研究 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]