事故容错燃料包壳材料在水化学环境中的动水腐蚀试验  

Experiment on Dynamic Water Corrosion of Accident Tolerant Fuel Cladding Materials in Hydrochemical Environment

作　　者：童刚 王诗槐 彭帆 卢冬华 王阔 严俊 薛佳祥 TONG Gang;WANG Shihuai;PENG Fan;LU Donghua;WANG Kuo;YAN Jun;XUE Jiaxiang(Comprehensive Thermal-Hydraulic and Safety Laboratory,China Nuclear Power Research Institute Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]中广核研究院有限公司综合热工水力与安全实验室,深圳518000

出　　处：《腐蚀与防护》2024年第6期81-86,共6页Corrosion & Protection

摘　　要：为了掌握事故容错燃料(ATF)包壳材料的耐动水腐蚀性能,搭建了专设台架以模拟堆芯部位的热工水力环境和水化学环境。针对普通Zr合金及涂覆Cr金属涂层的Zr合金、FeCrAl合金等ATF包壳候选材料在空管条件和内置电加热棒条件下分别开展动水腐蚀试验。结果表明:这三种材料在水化学环境中经动水腐蚀28 d后表面均未产生明显的氧化膜,表明各材料均有较好的短期耐蚀性;与空管条件相比,在内置电加热棒条件下,Zr合金和涂覆Cr金属涂层的Zr合金表面的颗粒状氧化产物更密集,抗氧化性能更优;在空管条件和内置电加热棒条件下,涂覆Cr金属涂层的Zr合金相较于普通Zr合金具有更好的耐蚀性,但在内置电加热棒条件下,两种材料表面均检测到其他相,有待进一步研究。In order to master the dynamic water corrosion resistance of accident tolerant fuel(ATF)cladding materials,a special bench was set up to simulate the thermal-hydraulic environment and water chemical environment of the core.The dynamic water corrosion tests were carried out for ordinary Zr alloy,Zr alloy coated with Cr metal coating,FeCrAl alloy and other ATF cladding candidate materials under the condition of empty tube and built-in electric heating rod.The results show that there was no obvious oxide film on the surface of the three cladding tube candidate materials after 28 days of corrosion in dynamic water in hydrochemical environment,indicating that each material had good short-term corrosion resistance.Compared with the empty tube condition,the granular oxidation products on the surface of Zr alloy and Zr alloy coated with Cr metal coating were denser and the oxidation resistance was better under the condition of built-in electric heating rod.Under the condition of empty tube and built-in electric heating rod,Zr alloy coated with Cr metal coating had better corrosion resistance than ordinary Zr alloy.However,under the condition of built-in electric heating rod,other phases were detected on the surface of both materials,which needed further study.

关 键 词：事故容错燃料(ATF) 包壳材料 动水腐蚀 微观形貌 

分 类 号：TL352[核科学技术—核技术及应用]