海阳核电厂1号核电机组堆内构件在制造过程中因热处理变形导致下堆芯支撑板平面度和燃料组件定位销孔的位置度超差。设计方在原因分析后给出了返修的处置意见,并提供了返修的方案。本文围绕该1号机组下堆芯支撑板的超差情况,对产生超差的原因进行了叙述,并介绍返修方案和返修情况。 Haiyang Nuclear Power Plant No. 1 nuclear reactor pile components in the manufacturing process due to heat deformation caused by the core support plate flatness and positioning of the fuel assembly hole location tolerance. Design side in the analysis of the reasons given after the disposition of the rework, and provides a rework program. In this paper, the cause of overshoot is described around the tolerance of the core support plate under Unit 1, and the rework plan and rework situation are introduced.