300MW锅炉汽包接管角焊缝缺陷安全评定  

Safety Assessment of Nozzle Fillet Defects on 300MW Boiler Steam Drum

作　　者：李立人[1] 盛建国[1] 吴祥鹏[1] 陈玮[1] 吴如松[2] 

机构地区：[1]上海发电设备成套设计研究所,上海200240 [2]上海锅炉厂有限公司,上海200245

出　　处：《力学季刊》2005年第3期517-522,共6页Chinese Quarterly of Mechanics

摘　　要：运用我国“压力容器缺陷评定规范”CVDA-1984及英国“Guideonmethodsforassessingtheacceptabilityofflawsinmetallicstructures”BS7910-1999,对300MW锅炉汽包接管缺陷安全性进行评定。汽包接管缺陷评定所需的汽包各运行工况温度场、应力场,通过有限元计算获得。评定结果表明:在设计工况下的30年服役期内,该锅炉汽包接管现有缺陷不会引发一次性脆性断裂,汽包现有缺陷扩展不会对安全运行构成威胁,汽包现有缺陷可不进行返修处理而继续安全运行。Using “code of pressure vessels defects assessing” of our country （CVDA-1984） and “Guide on methods for assessing the acceptability of flaws in metallic structures”（BS 7910-1999）, the safety of nozzle fillet defects on 300MW boiler steam drum was assessed. The temperature field and stress field were obtained by finite element method. The result shows that the defects will not cause brittle rupture, the propagating defects will not threaten to boiler＇s safety operation, the drum with defects can be operated safely without repair under the design condition within 30 years enlistment.

关 键 词：锅炉汽包 接管缺陷 温度场 应力场 脆性断裂 低周疲劳 缺陷安全评定 

分 类 号：O346[理学—固体力学]