浅析影响反应堆压力容器主螺栓现场安装的因素

摘要

Based on occurred CPR1000 reactor pressure vessel stud unscrewing in stud hole on site by u-sing multi stud tensioning machine(MSTM)in a domestic nuclear power plant,and combined the charac-teristics of its′stud screw thread structure and performance of MSTM,the influencing factors causing this phenomena were analyzed.The influencing mechanism of each factor was discussed.Then corresponding preventive measures were proposed.%针对国内某核电厂 CPR1000反应堆压力容器主螺栓采用整体螺栓拉伸机现场安装时无法顺利旋入主螺孔的现象，结合其主螺栓螺纹副结构和整体螺栓拉伸机性能特点，分析了造成该现象的影响因素，讨论了各因素的影响机理，并提出了相应的预防措施。