Valve motor operator improvements: Final report
Technical Report
·
OSTI ID:5685280
The performance of motor operated valves (MOVs) has been the subject of intense study over the past few years. Significant events resulting from MOV failures, including incapacitation of emergency and/or safe shutdown systems, have been reported frequently by numerous nuclear plant licensees. Evidence points to the fact that the documented failures are largely attributable to deficiencies in equipment design, application, operational and maintenance practices, and in the basic understanding of the equipment. The overall objectives of this project were to identify the specific root causes of selected events related to improper performance of valve motor operators; identify/develop means to correct the performance deficiencies; field test the identified/developed means for corrective action; and provide for the technology transfer of the developed corrective actions. The principal output of this research project was the development of the Intellitorque system, a microprocessor based control and diagnostics system intended for use on valve motor operators. The final report summarizes the Phase I effort, which included the laboratory development and testing of Intellitorque, and the Phase II effort, which has culminated in the installation and field demonstration of Intellitorque at two US nuclear power facilities. 17 refs., 93 figs., 19 tabs.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (USA); Foster-Miller, Inc., Waltham, MA (USA)
- OSTI ID:
- 5685280
- Report Number(s):
- EPRI-NP-5696
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
220900 -- Nuclear Reactor Technology-- Reactor Safety
COMPUTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DIAGNOSTIC TECHNIQUES
DOCUMENT TYPES
ELECTRONIC CIRCUITS
EQUIPMENT
FAILURE MODE ANALYSIS
FAILURES
FLOW REGULATORS
MAINTENANCE
MATERIALS TESTING
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MOTORS
NONDESTRUCTIVE TESTING
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
PROGRESS REPORT
REACTOR CONTROL SYSTEMS
REACTOR INSTRUMENTATION
REACTOR SAFETY
RECOMMENDATIONS
SAFETY
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING
THERMAL POWER PLANTS
VALVES
220200* -- Nuclear Reactor Technology-- Components & Accessories
220900 -- Nuclear Reactor Technology-- Reactor Safety
COMPUTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DIAGNOSTIC TECHNIQUES
DOCUMENT TYPES
ELECTRONIC CIRCUITS
EQUIPMENT
FAILURE MODE ANALYSIS
FAILURES
FLOW REGULATORS
MAINTENANCE
MATERIALS TESTING
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MOTORS
NONDESTRUCTIVE TESTING
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
PROGRESS REPORT
REACTOR CONTROL SYSTEMS
REACTOR INSTRUMENTATION
REACTOR SAFETY
RECOMMENDATIONS
SAFETY
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING
THERMAL POWER PLANTS
VALVES