磁悬浮控制棒驱动线密封管划伤的不符合项处理

在进行磁悬浮控制棒驱动线的综合性能试验时，发现部分密封管的外壁产生严重的不可接受的划伤。通过控制棒驱动线运行的温升试验、解体试验，发现加工制造过程中的残留切屑、局部结构的不合理、滑动副部件的材料选取不当是造成密封管产生划痕的主要原因。通过对密封管外部进行渗氮处理、清理间隙槽内的加工残留物，钝化各锐角，更换限位套的材料，增加连杆上的导流孔等整改措施后，进行了驱动线的运行考验和快速落棒试验，未发现产生新的划痕并有效缩短了控制棒的快速落棒时间。本工作采取的措施及取得的试验结果，可为同类控制棒驱动线的加工制造和运行维护提供借鉴作用。

Disposal on Unqualified Items About Crape on Sealing Tube in Control Rod Driving System Suspended by Magnetic Force

Serious unacceptable scrapes on the ektexine of some sealing tubes were discovered during integrative capability test of control rod driving framework suspended by magnetic force. Heating and disasembling tests on control rod driving framework were carried out. The results show that rudimental bits during maching, impertinency in local configuration and improper chosen material of gliding parts are main reasons. Filtering nitrogen, disposing of maching rudimental matter, acute angle passivation, replacing material, increasing guide flowing holes were performed, after which run and downfall tests were carried out. It is shown that no new scrapes appear and rob downfall time decreases. The method and results can be conference for maching and maintenance of congener control rob driving framework.