G - Physics – 21 – C
Patent
G - Physics
21
C
359/27
G21C 19/32 (2006.01) G21C 19/00 (2006.01)
Patent
CA 1202125
METHOD AND APPARATUS FOR CHANGING FILTERS IN NUCLEAR POWER STATIONS ABSTRACT OF THE DISCLOSURE A remote control apparatus for removing from one of a number of filter pits, and loading for protective storage in a disposal drum, radioactive filters used in nuclear power generating stations, and for replacing spent filters. The apparatus includes a transportable base adapted to be placed adjacent the respective filter pit and a hoist mechanism mounted on the base. The hoist mechanism includes a vertical tower or mast mounted on the base, a generally horizontal boom mounted on and extending outwardly from the top of the mast, a grab mechanism for engaging various specially adapted articles, including spent filters to be removed and new filters for replacement, means for operating the grab mecha- nism from a remote location, a lift mechanism for supporting the grab mechanism from the outer end of the boom and for raising and lowering it in a vertical path, and means for operating the lift mechanism from the remote location. A drum turret is mounted on the base for rotary movement about a vertical axis spaced from the vertical path, to and from a filter receiving position wherein a storage drum carried thereby is placed in the aforesaid vertical path to receive a removed filter to be lowered therein by the lift mechanism. The drum turret is adapted to be operated from a remote loca- tion. A second turret is mounted on the mast intermediate the base and the boom for rotary movement about the aforesaid vertical axis and has preferably two radially extending plat- forms adapted to be positioned selectively in alignment with the vertical path of travel to receive from or locate for the grab means a spent or new filter or other article to be sup- ported by the second turret. The second turret is also adapted to be operated from a remote shielded location.
429364
Christofer Donald E.
Homer John C.
Stock Arthur J.
Torok Robert J.
Whittington Thomas
Borden Ladner Gervais Llp
General Signal Corporation
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