Patent Number: 044366949
Section: claims

1. Apparatus for decontaminating the inside walls of a nuclear reactor cavity in a refueling floor, having a raised curb around its periphery which comprises: a chassis having wheels in rolling contact with said floor;  first and second curb wheels mounted on said chassis in horizontal rolling contact with said curb;  a support member extending upwardly and laterally from said chassis;  an elongated mast depending from said support member and into the reactor cavity;  at least one reaction wheel carried by said mast for horizontal rolling engagement with the cavity wall;  a carriage vertically positionable along said elongated mast; and  means carried by said carriage for spraying decontaminating fluid on said cavity wall. 2. The apparatus of claim 1 wherein said chassis includes a motor connected to drive at least one of said floor contacting wheels. 3. The apparatus of claim 1 wherein said curb wheels include adjustable mounting means for varying the distance between each of said curb wheels and said chassis. 4. The apparatus of claim 3 wherein said mounting means comprises a scissors jack. 5. The apparatus of claim 1 wherein said mast includes means for raising and lowering said carriage. 6. The apparatus of claim 5 wherein said raising and lowering means comprises a cable. 7. The apparatus of claim 5 wherein said spraying means comprises water nozzles. 8. The apparatus of claim 7 wherein said carriage includes a protective shroud surrounding said nozzles. 9. The apparatus of claim 8 wherein said curb wheels include adjustable mounting means for varying the distance between each of said curb wheels and said chassis. 10. The apparatus of claim 9 wherein said chassis includes a motor connected to drive at least one of said floor contacting wheels.