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6 Transfer of radioactive materials from shipping casks to the hot cells generally takes place using the cask tunnel and cart. Shipping casks larger than 17 feet long by 56 inches in diameter or 30 tons use the Loop Insertion Cell and main cell roof penetration. Small casks weighing less than 5 tons can be transferred through the cart room and hot repair area into the decontamination cell where they can be unloaded remotely. The destructive and nondestructive examination capabilities listed below are available to NSUF users. Visual Exam Machine Eddy Current Tester This machine provides a dedicated workstation for performing visual examination on fuel elements capsules and other irradiated items. It comprises a standard in-cell exami- nation stage and a modified Kollmorgan through-wall shielded periscope designed for full-surface inspection and photo documentation of irradiated fuel elements or capsules. Its commercial photographic strobe lights are used exclusively for photography while built-in halogen modeling lamps are used for both viewing and photography. The Kollm- organ periscope provides controls for aiming the objective i.e. pointing the line-of-view selecting among three magnifications and focusing the image. The standard spherical optics of the periscope have been replaced with special planar optics that maintain the entire surface of a flat object oriented normal to the optical axis of the system in focus at the film plane. Schematic of the Hot Fuels Examination Facility.