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Title: Ultrasonic liquid-level detector for varying temperature and pressure environments

Abstract

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.

Inventors:
;
Issue Date:
OSTI Identifier:
5183319
Application Number:
ON: DE82016113
Assignee:
Dept. of Energy ERA-07-047945; EDB-82-130336
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 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

Citation Formats

Anderson, R.L., and Miller, G.N. Ultrasonic liquid-level detector for varying temperature and pressure environments. United States: N. p., 1981. Web.
Anderson, R.L., & Miller, G.N. Ultrasonic liquid-level detector for varying temperature and pressure environments. United States.
Anderson, R.L., and Miller, G.N. Mon . "Ultrasonic liquid-level detector for varying temperature and pressure environments". United States.
@article{osti_5183319,
title = {Ultrasonic liquid-level detector for varying temperature and pressure environments},
author = {Anderson, R.L. and Miller, G.N.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {10}
}