Ultrasonic system for monitoring vibrations in a nuclear reactor
Abstract
Abstract Apparatus for detecting the frequency and amplitude of vibration of a preselected vibrating member inside a nuclear reactor vessel from an external point including a transducer mounted on the outside of the vessel for transmitting a signal to said member and receiving an echo back from the vibrating member. a pulse generator for generating repetitive pulses, a high-frequency oscillator triggered by the pulse generator, the transducer being excited by the high-frequency pulses for transmitting the signal, a delay circuit having a time delay equivalent to the time interval for ultrasonic pulses traveling between the transducer and the operating member, a phase detector, a gate circuit synchronized with the pulse generator for feeding the delayed transmitting pulses and the corresponding receiving echoes simultaneously to the phase detector, and read-out means for the frequency and amplitude of vibration of the vibrating member.
Inventors
- 👤 C Scott
- 👤 J Lagowski
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |