Measuring and testing – Vibration – By mechanical waves
Patent
1980-04-08
1983-05-24
Ciariante, Anthony V.
Measuring and testing
Vibration
By mechanical waves
376249, G01N 2900
Patent
active
043844898
ABSTRACT:
To monitor a nuclear fuel element or fuel elements located in a store, e.g. a pond in a swimming pool reactor, the store is illuminated ultrasonically using one or more transducers transmitting ultrasonic signals in one or more predetermined directions to obtain an output which, because it depends on the number and relative location of the fuel elements in the store, and the structure of the store itself is distinctive to the fuel elements or elements stored therein. From this distinctive output is derived an identity unique to the stored fuel element or elements and a reference signal indicative of the whole structure when intact, the reference signal and identity being recorded. Subsequent ultrasonic testing of the store and its contents under identical operating conditions produces a signal which is compared to the recorded reference signal and if different therefrom reveals the occurrence of tampering with the store and/or the fuel element or elements.
REFERENCES:
patent: 4104618 (1978-08-01), Towsend
patent: 4123748 (1978-10-01), Otani
patent: 4128011 (1978-12-01), Savage
Crutzen, S. J., et al., "Application of Tamper-Resistant Identification and Sealing Techniques for Safeguards", pp. 305-338.
Borloo Elie
Buergers Wilhelm
Crutzen Serge
Vinche Claude
Ciariante Anthony V.
European Atomic Energy Community (EURATOM)
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