Apparatus for grinding off the outer shell of a spherical body
Patent
·
OSTI ID:6418433
Spent nuclear fuel elements of spherical shape are stripped of their outer graphite shell surrounding the graphite matrix in which fuel particles are embedded by being admitted one by one to a work space between a rotary milling disk and an axially shiftable, but non-rotary, reaction disk. The radially ribbed stepped surfaces of low-pitched helical configuration allow the spherical body to shift its position several times per revolution as it rolls around between the disks under pressure from a spring acting on the axially movable disk. A spacing collar prevents the two disks from approaching closer than a minimum spacing sufficient to prevent more than the outer graphite shell to be worn away. By operating the work space with two or more spheres therein at the same time, a damaged or out-of-round fuel element can be ground to a spherical shape if at least one of the spheres in the work space is truly spherical. Pairs of disks may be operated together in coaxial alignment to provide a high throughput rate. The graphite grindings are usable for making new fuel elements.
- Assignee:
- Kernforschungsanlage Julich GmbH (Germany, Federal Republic of)
- Patent Number(s):
- US 4457064
- OSTI ID:
- 6418433
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
050800* -- Nuclear Fuels-- Spent Fuels Reprocessing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
CARBON
COMMINUTION
DECLADDING
DESIGN
ELEMENTAL MINERALS
ELEMENTS
ENRICHED URANIUM REACTORS
FUEL ELEMENTS
FUEL PARTICLES
FUEL SPHERES
GRAPHITE
GRINDING
GRINDING MACHINES
HEAD END PROCESSES
HTR REACTOR
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
MACHINE TOOLS
MACHINING
MANAGEMENT
MATERIALS RECOVERY
MECHANICAL DECLADDING
MINERALS
NONMETALS
POOL TYPE REACTORS
PROCESSING
REACTOR COMPONENTS
REACTORS
RECOVERY
REPROCESSING
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SEPARATION PROCESSES
SPENT FUEL ELEMENTS
THERMAL REACTORS
TOOLS
TRAINING REACTORS
WASTE MANAGEMENT
WASTE PROCESSING
WATER COOLED REACTORS
WATER MODERATED REACTORS
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
CARBON
COMMINUTION
DECLADDING
DESIGN
ELEMENTAL MINERALS
ELEMENTS
ENRICHED URANIUM REACTORS
FUEL ELEMENTS
FUEL PARTICLES
FUEL SPHERES
GRAPHITE
GRINDING
GRINDING MACHINES
HEAD END PROCESSES
HTR REACTOR
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
MACHINE TOOLS
MACHINING
MANAGEMENT
MATERIALS RECOVERY
MECHANICAL DECLADDING
MINERALS
NONMETALS
POOL TYPE REACTORS
PROCESSING
REACTOR COMPONENTS
REACTORS
RECOVERY
REPROCESSING
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SEPARATION PROCESSES
SPENT FUEL ELEMENTS
THERMAL REACTORS
TOOLS
TRAINING REACTORS
WASTE MANAGEMENT
WASTE PROCESSING
WATER COOLED REACTORS
WATER MODERATED REACTORS