Patent Number: 
Section: claims

1. A robotic apparatus for remotely inspecting at least one component in an annulus region of a reactor pressure vessel of a nuclear power plant, comprising:a partial track positioned on an annular rim of a core shroud in the reactor pressure vessel and horizontally movable along the rim;a frame assembly, comprising:a frame movably connected to the partial track such that the frame is horizontally movable along the partial track;at least one mast assembly;at least one mast positioning assembly; andat least one inspection device attached to the at least one mast assembly; anda braking system connected to the partial track and the frame assembly, structured such that when activated, the partial track is stationary and the frame assembly is horizontally movable along the partial track and when deactivated, the partial track is horizontally movable along the annular rim of the core shroud and the frame assembly is stationary. 2. The apparatus of claim 1, wherein a first mast assembly is positioned on one side of the frame and a second mast assembly is positioned on an opposite side of the frame. 3. The apparatus of claim 1, wherein a first mast positioning device is positioned on one side of the frame and a second mast positioning assembly is positioned on an opposite side of the frame. 4. The apparatus of claim 1, wherein a first pan and tilt assembly is positioned on one side of the frame and a second pan and tilt assembly is positioned on an opposite side of the frame. 5. The apparatus of claim 1, wherein the frame assembly includes a positioning motor and gear combination to move the frame assembly along the track. 6. The apparatus of claim 1, wherein the inspection device is a camera. 7. The apparatus of claim 1, wherein the at least one mast assembly comprises a mast that is capable of becoming rigidly stable in an extended tube form and a retracted rolled form.