G - Physics – 01 – N
Patent
G - Physics
01
N
209/29.1, 340/12
G01N 21/01 (2006.01) B07C 5/342 (2006.01) G21C 17/06 (2006.01)
Patent
CA 1057704
AUTOMATIC INSPECTION AND SORTING SYSTEM FOR CHIPPED NUCLEAR FUEL PELLETS ABSTRACT OF THE DISCLOSURE Nuclear fuel pellets to be inspected for surface flaws, such as chips, are fed onto spaced rotating shafts or rollers which rotate each pellet at a predetermined speed. A motor driven chain mounted for linear movement beneath the rollers carries outwardly extending arms which contact the ends of pellets on the rollers to advance them axially along the roller length and beneath a distance indicating optical probe. As each advancing rotating pellet moves under and is optically scanned by the probe, light reflected from inden- tations or flaws, such as chips, in the pellet surface, is converted to signals which correspond to the flawed area and feeds them to a flow-time integrating circuit. This circuit integrates the sum of surface flaw-time and compares the integrated signal to a standard reference. Should this exceed the standard, the circuit energizes a solenoid which effects removal of the defective pellet from the system. The integrating circuit is controlled by a photocell which makes the circuit operative only during the time a pellet is advancing linearly under the probe.
268876
Boomgaard Dirk J.
Ferree Herbert E.
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