System diagnostics using qualitative analysis and component functional classification
Abstract
A method for detecting and identifying faulty component candidates during off-normal operations of nuclear power plants involves the qualitative analysis of macroscopic imbalances in the conservation equations of mass, energy and momentum in thermal-hydraulic control volumes associated with one or more plant components and the functional classification of components. The qualitative analysis of mass and energy is performed through the associated equations of state, while imbalances in momentum are obtained by tracking mass flow rates which are incorporated into a first knowledge base. The plant components are functionally classified, according to their type, as sources or sinks of mass, energy and momentum, depending upon which of the three balance equations is most strongly affected by a faulty component which is incorporated into a second knowledge base. Information describing the connections among the components of the system forms a third knowledge base. The method is particularly adapted for use in a diagnostic expert system to detect and identify faulty component candidates in the presence of component failures and is not limited to use in a nuclear power plant, but may be used with virtually any type of thermal-hydraulic operating system. 5 figures.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 5377429
- Patent Number(s):
- 5265035
- Application Number:
- PPN: US 7-885132
- Assignee:
- Univ. of Chicago, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 18 May 1992
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 22 GENERAL STUDIES OF NUCLEAR REACTORS; NUCLEAR POWER PLANTS; REACTOR COMPONENTS; DIAGNOSTIC TECHNIQUES; DETECTION; EXPERT SYSTEMS; FAILURES; NUCLEAR FACILITIES; POWER PLANTS; THERMAL POWER PLANTS; 220200* - Nuclear Reactor Technology- Components & Accessories
Citation Formats
Reifman, J, and Wei, T Y.C. System diagnostics using qualitative analysis and component functional classification. United States: N. p., 1993.
Web.
Reifman, J, & Wei, T Y.C. System diagnostics using qualitative analysis and component functional classification. United States.
Reifman, J, and Wei, T Y.C. Tue .
"System diagnostics using qualitative analysis and component functional classification". United States.
@article{osti_5377429,
title = {System diagnostics using qualitative analysis and component functional classification},
author = {Reifman, J and Wei, T Y.C.},
abstractNote = {A method for detecting and identifying faulty component candidates during off-normal operations of nuclear power plants involves the qualitative analysis of macroscopic imbalances in the conservation equations of mass, energy and momentum in thermal-hydraulic control volumes associated with one or more plant components and the functional classification of components. The qualitative analysis of mass and energy is performed through the associated equations of state, while imbalances in momentum are obtained by tracking mass flow rates which are incorporated into a first knowledge base. The plant components are functionally classified, according to their type, as sources or sinks of mass, energy and momentum, depending upon which of the three balance equations is most strongly affected by a faulty component which is incorporated into a second knowledge base. Information describing the connections among the components of the system forms a third knowledge base. The method is particularly adapted for use in a diagnostic expert system to detect and identify faulty component candidates in the presence of component failures and is not limited to use in a nuclear power plant, but may be used with virtually any type of thermal-hydraulic operating system. 5 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 23 00:00:00 EST 1993},
month = {Tue Nov 23 00:00:00 EST 1993}
}