G - Physics – 01 – T
Patent
G - Physics
01
T
359/19, 358/20
G01T 1/22 (2006.01) G21C 17/00 (2006.01) G21C 19/06 (2006.01)
Patent
CA 1152235
METHOD FOR MONITORING IRRADIATED FUEL USING CERENKOV RADIATION ABSTRACT OF THE DISCLOSURE A method is provided for monitoring irradiated nuclear fuel inventories located in a water-filled storage pond where- in the intensity of the Cerenkov radiation emitted from the water in the vicinity of the nuclear fuel is measured. This intensity is then compared with the expected intensity for nuclear fuel having a corresponding degree of irradiation exposure and time period after removal from a reactor core. Where the nuclear fuel inventory is located in an assembly having fuel pins or rods with intervening voids, the Cerenkov light intensity measurement is taken at selected bright spots corresponding to the water-filled interstices of the assembly in the water storage, the water-filled interstices acting as Cerenkov light channels so as to reduce cross-talk. On-line digital analysis of an analog video signal is possible, or video tapes may be used for later mearurement using a video editor and an electrometer. Direct measurement of the Cerenkov radiation intensity also is possible using spot photometers pointed at the assembly.
376637
Caldwell John T.
Dowdy Edward J.
Nicholson Nicholas
Meredith & Finlayson
United States (government Of The) Of America As Repres Ented By
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