A THROUGH-ROOF HOIST FOR REMOTE MAINTENANCE OF HOT-CELL LIGHTS IN THE PROCESSING REFABRICATION EXPERIMENT
As part of the Processing Refabrication Experiment (PRE) a facility was designed to demonstrate the remote processing of short-cooled nuclear fuels which had been irradiated to power reactor levels. The Luminaire assembly, which was developed and operated as part of the PRE to meet these needs, consists of a 3-kw lamp located along the longitudinal axis of the parabolic surface of a reflector- type heat exchanger. The insulated electrical and coolant lines pass through a precisely surfaced through-roof conduit to the utility supply outside the cell. The throughroof conduit is tubular, filled with magnesia and steel shot shielding materials, and sealed to the installation housing by a primary in-cell seal and secondary outof-cell seals. The conduit is supported by both an out-of-cell lock nut which also serves to compress the in-cell gasket-seal during lamp operations and extension rods suspended from an out-of-cell hoist during luminaire maintenance operation. The through-roof conduit, extension rods, and hoist perform ss a rigidarm crane to lower luminaire assemblies for in-cell maintenance. With the luminaire assembly replaced by a special hook attachment, items such as top-riding hoists, manipulators, and associated bridges could be lowered in the cell for maintenance. The technical oonsiderations affecting design and an evaluation of operational and maintenance procedures are presented. (auth)
- Research Organization:
- Atomics International Div., North American Aviation, Inc., Canoga Park, Calif.
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(11-1)-GEN-8
- NSA Number:
- NSA-13-021083
- OSTI ID:
- 4220873
- Report Number(s):
- NAA-SR-2983
- Country of Publication:
- United States
- Language:
- English
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