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Title: Evaluation of pressure sensing concepts: A technology assessment

Advanced distributed control systems for electric power plants will require more accurate and reliable pressure gauges than those now installed. Future developments in power plant control systems are expected to use digital/optical networks rather than the analog/electric data transmission used in existing plants. Many pressure transmitters now installed use oil filling to separate process fluids from the gauge mechanism and are subject to insidious failures when the oil leaks. Testing and maintenance of pressure channels occupy a disproportionately large amount of effort to restore their accuracy and verify their operability. These and similar concerns have prompted an assessment of a broad spectrum of sensor technologies to aid in selecting the most likely candidates for adaptation to power plant applications. Ten representative conventional and thirty innovational pressure sensors are described and compared. Particular emphasis is focused on two categories: Silicon-integrated pressure sensors and fiber-optic sensors, and both of these categories are discussed in detail. Additional attractive concepts include variable reluctance gauges and resonant structure gauges that may not require oil buffering from the process fluid.
Authors:
;
Publication Date:
OSTI Identifier:
10190000
Report Number(s):
ORNL/TM--12296
ON: DE94001036
DOE Contract Number:
AC05-84OR21400
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Sep 1993
Research Org:
Oak Ridge National Lab., TN (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 20 FOSSIL-FUELED POWER PLANTS; 47 OTHER INSTRUMENTATION; PRESSURE GAGES; TECHNOLOGY ASSESSMENT; POWER PLANTS; CONTROL SYSTEMS; SEMICONDUCTOR DEVICES; SILICON; FIBER OPTICS; DIGITAL SYSTEMS; RELIABILITY; MAINTENANCE; PARAMETRIC ANALYSIS; PIPES 220200; 200104; 440800; COMPONENTS AND ACCESSORIES; COMPONENTS; MISCELLANEOUS INSTRUMENTATION