【摘要】 在压水堆核电厂运行时，一回路组件中的结构材料在高温高压水环境下发生腐蚀，所产生的腐蚀产物随冷却剂迁移至燃料包壳表面并沉积，形成污垢（CRUD）。腐蚀产物沉积行为会恶化传热，导致沸腾危机提前发生，并引起包壳外表面局部温度升高，引发包壳的局部腐蚀失效。从来源和迁移以及沉积过程等方面综述了压水堆燃料包壳CRUD的形成机理，阐述了冷却剂pH、杂质离子浓度、注锌、溶解氢含量等水化学参数，冷却剂流速、热通量、冷却剂温度、定位格架结构等热工水力参数以及包壳材料对腐蚀产物沉积行为的影响，简述了预测腐蚀产物沉积行为的相关模型，包括Short模型、Uchida模型、多物理场耦合模型等。最后提出了压水堆燃料包壳腐蚀产物沉积行为今后的研究方向。更多还原

【Abstract】 During operation of pressurized water reactors, structural materials in the primary circuit undergo corrosion in high-temperature and high-pressure water. The resulting corrosion products are transported by the coolant to fuel cladding surfaces and deposite, forming Chalk River unidentified deposits(CRUD). The deposition behavior of corrosion products will deteriorate heat transfer,cause the boiling crisis to occur earlier,and lead to a local temperature increase on the outer surface of the cladding,resulting in local corrosion failure of the cladding. The formation mechanisms of CRUD of fuel cladding in pressurized water reactors are reviewed from aspects such as source,migration and deposition process. The effects of water chemistry parameters such as coolant pH value,impurity ion concentration,zinc injection,and dissolved hydrogen content,and thermal-hydraulic parameters such as coolant velocity,heat flux,coolant temperature,and spacer grid structure,as well as cladding materials on the deposition behavior of corrosion products are expounded. The relevant models for predicting the deposition behavior of corrosion products,including Short model,Uchida model and multi-physics coupling model,are briefly described. Finally,the future research directions for the deposition behavior of corrosion products of fuel cladding in pressurized water reactors are proposed.更多还原