Patent Number: 044252986
Section: claims

1. Baffle maintenance apparatus for inspecting baffle plates in a nuclear reactor comprising: a support member capable of being positioned in a nuclear reactor;  a carriage slidably disposed on said support member;  a platform disposed on said carriage;  a rod slidably disposed in said platform;  a rotatable member rotatably disposed on said rod and having a plurality of feeler gauges attached thereto for selectively inserting said feeler gauges between said baffle plates for determining the width of the space between said baffle plates;  actuator means connected to said rod for moving said rod and said rotatable member relative to said platform; and  indexing means mounted on said platform and arranged to contact said rotatable member when said rotatable member is moved relative to said platform for contacting and rotating said rotatable member relative to said platform.  a base fixedly mounted on said carriage and slidably connected to said platform; and  positioning means connected to said base and to said platform for moving said platform relative to said base.  a dog pivotally mounted on said platform and arranged to contact said rotatable member;  a post mounted on said platform and arranged to contact said dog and to prevent rotation of said dog in one direction; and  biasing means attached to said dog and arranged to urge said dog into contact with said post. 2. The baffle maintenance apparatus according to claim 1 wherein said indexing means comprises a pivotable stop mounted on said platform and arranged to contact and rotate said rotatable member when said rotatable member is moved relative to said platform in a first direction and arranged to contact but not rotate said rotatable member when said rotatable member is moved relative to said platform in a direction opposite to said first direction. 3. The baffle maintenance apparatus according to claim 2 wherein said baffle maintenance apparatus further comprises: 4. The baffle maintenance apparatus according to claim 3 wherein said positioning means comprises a second rod slidably disposed in a first slot in said base and slidably disposed in a second slot in said platform with said second slot being arranged in a plane different from the plane of said first slot whereby movement of said second rod in said first slot and in said second slot causes said platform to slide relative to said base. 5. The baffle maintenance apparatus according to claim 4 wherein said pivotable stop comprises: 6. The baffle maintenance apparatus according to claim 5 wherein said feeler gauges are mounted on said rotatable member in an equally spaced manner. 7. The baffle maintenance apparatus according to claim 6 wherein said rotatable member is a circular member and has said feeler gauges mounted thereon and spaced at equal distances around the circumference of said rotatable member. 8. The baffle maintenance apparatus according to claim 7 wherein said baffle maintenance apparatus further comprises drive means mounted on said support member and connected to said carriage for moving said carriage relative to said support member.