摘要
三代核电机组AP1000主冷却剂泵(RCP)泵壳与蒸汽发生器(SG)焊接接头为重要承压边界焊缝之一;焊后泵壳管嘴位置公差直接影响主泵内部构件和现场主管道装配。本文结合国内首台设备制造实例,针对此焊缝焊接变形大,易出现不符合项情况,提出一些防止焊接变形过大而导致泵壳位置超差的控制措施,如装配对中、坡口设计、焊接过程控制等。检测数据表明:按本文给出的工艺组焊的4个泵壳,其排出管嘴角度、主法兰面与SG基准A的俯仰角、轴向收缩控制均满足设计要求。
The weld joint between reactor coolant pump （RCP） casing and steam generator is important pressure boundary, and the nozzle position tolerance of RCP casing will impact consecutive assembly of the RCP and pipe. This paper gives the example of the domestic first equipment fabrication, aiming at the welding deformation and easily nonconformance condition, and proposes some control measures avoiding the exceeding position tolerance due to serious weld deformation, such as RCP casing assembly alignment, weld preparation design and process control. The data shows that： the four as-built RCP casings according to the welding process, the discharge angle, angle of pitch between the main flange surface and the steam generator datum A and axes direction welding shrinkage is acceptable, and meet design requirements.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2017年第1期77-81,共5页
Nuclear Power Engineering
