Radiant energy – Automatic/serial detection of similar sources
Patent
1979-11-02
1981-09-22
Smith, Alfred E.
Radiant energy
Automatic/serial detection of similar sources
250390, 250392, G01T 100, H01J 4712
Patent
active
042912270
ABSTRACT:
A nondestructive method for uniqely distinguishing among and quantifying the mass of individual fuel plates in situ in fuel drawers utilized in nuclear reactors is described. The method is both rapid and passive, eliminating the personnel hazard of the commonly used irradiation techniques which require that the analysis be performed in proximity to an intense neutron source such as a reactor. In the present technique, only normally decaying nuclei are observed. This allows the analysis to be performed anywhere. This feature, combined with rapid scanning of a given fuel drawer (in approximately 30 s), and the computer data analysis allows the processing of large numbers of fuel drawers efficiently in the event of a loss alert.
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Lakosi, L. et al., "Uranium Assay of Fuel Rods by Passive Gamma-ray Spectrometry", ERA vol. 4, No. 11, Jun. 15, 1979.
Ruhter, W. D., et al., "Nondestructive Assay of Mixed Uranium-Plutonium Oxides by Gamma-Ray Spectrometry", ERA vol. 4, No. 10, May 13, 1979.
Caldwell John T.
Fehlau Paul E.
France Stephen W.
Besha Richard G.
Denny James E.
Gaetjens Paul D.
Howell Janice A.
Smith Alfred E.
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