Ultrasonic liquid-level detector for varying temperature and pressure environments
An ultrasonic liquid level detector for use in varying temperature and pressure environments, such as a pressurized water nuclear reactor vessel, is provided. The detector employs ultrasonic extensional and torsional waves launched in a multiplexed alternating sequence into a common sensor. The sensor is a rectangular cross section stainless steel rod which extends into the liquid medium whose level is to be detected. The sensor temperature derived from the extensional wave velocity measurements is used to compensate for the temperature dependence of the torsional wave velocity measurements which are also level dependent. The torsional wave velocity measurements of a multiple reflection sensor then provide a measurement of liquid level over a range of several meters with a small uncertainty over a temperature range of 20 to 250/sup 0/C and pressures up to 15 MPa.
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- Dept. of Energy
- Application Number:
- ON: DE82016113
- OSTI ID:
- 5183319
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
LEVEL INDICATORS
DESIGN
ULTRASONIC WAVES
PWR TYPE REACTORS
ACOUSTIC MONITORING
PULSE CIRCUITS
RODS
STAINLESS STEELS
TEMPERATURE DEPENDENCE
TRANSDUCERS
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
ELECTRONIC CIRCUITS
IRON ALLOYS
IRON BASE ALLOYS
MEASURING INSTRUMENTS
MONITORING
REACTORS
SOUND WAVES
STEELS
WATER COOLED REACTORS
WATER MODERATED REACTORS
440300* - Miscellaneous Instruments- (-1989)
220400 - Nuclear Reactor Technology- Control Systems
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled