Application of diagnostics to determine operational readiness of aged motor-operated valves

Conference · Mon Jun 29 04:00:00 EDT 1987

OSTI ID:6345812

Eissenberg, D M

Oak Ridge National Laboratory (ORNL) has been carrying out an aging assessment of motor-operated valves (MOVs) with the primary objective of recommending diagnostic methods for detecting and trending aging. As a result of experimental investigations at ORNL, it was discovered that the motor current during a valve stroke was a very useful diagnostic parameter for detecting and trending many MOV drive train load variations. The motor current signatures were analyzed at four levels: mean value for a stroke, gross trends during a stroke, transients, and noise frequency spectra. Examples illustrating the use of this technique are presented. The use of motor current signature analysis was also shown to apply to other electric motor driven equipment. Future work includes developing a data base of MOV diagnostics, including criteria for determining the extent of degradation and application of the technique to other LWR motor driven safety equipment.

• Research Organization: Oak Ridge National Lab., TN (USA); International Atomic Energy Agency, Vienna (Austria)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6345812
• Report Number(s): IAEA-SM-295/35; CONF-870604-1; ON: DE87011673
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
220900* -- Nuclear Reactor Technology-- Reactor Safety
AGING
CONTROL EQUIPMENT
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTRIC MOTORS
EQUIPMENT
EXPERIMENTAL DATA
FAILURES
FLOW REGULATORS
INFORMATION
MOTORS
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
NUMERICAL DATA
POWER PLANTS
REACTOR SAFETY
SAFETY
SERVICE LIFE
TESTING
THERMAL POWER PLANTS
VALVES