公开(公告)号：US20170275141A1

公开(公告)日：2017-09-28

申请号：US15608225

申请日：2017-05-30

申请人： Greg Weston

发明人： Greg Weston

IPC分类号： B66C17/26 ,  G21D3/04 ,  G21C7/36

CPC分类号： B66C17/26 ,  B66C17/00 ,  B66C19/00 ,  G21C19/02 ,  G21C19/207 ,  G21C19/32 ,  G21D1/02 ,  Y02E30/40

摘要： Methods for nuclear power plant maintenance which reduces outage time while a polar crane is maintained. In some examples, the method includes the steps of placing an auxiliary crane on a set of rails of a polar crane, using the auxiliary crane to perform maintenance work while the polar crane is maintained, and removing the auxiliary crane after maintenance work on the polar crane is completed. In some further examples, the method includes placing a second auxiliary crane on the set of rails. Still in other example, bridge motors are used to turn the rails, allowing the auxiliary crane to reach every area of the plant floor.