Aging and service wear of solenoid-operated valves used in safety systems of nuclear power plants

Technical Report · Wed Jul 01 00:00:00 EDT 1992

OSTI ID:7295854

Kryter, R C ^[1]

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1. Oak Ridge National Lab., TN (United States)

Solenoid-operated valves (SOVS) were studied at Oak Ridge National Laboratory as part of the US Nuclear Regulatory Commission Nuclear Plant Aging Research (NPAR) Program. The primary objective of the study was to identify, evaluate, and recommend methods for inspection, surveillance, monitoring, and maintenance of SOVs that can help ensure their operational readine--is, their ability to perform required safety functions under all anticipated operating condition--because, under certain circumstances, failure of one of these small and relatively inexpensive devices could have serious consequences. An earlier (Phase I) NPAR Program study described SOV failure modes and causes and identified measurable parameters thought to be linked to the progress of degradations that may ultimately result in functional failure of the valve. Using this earlier work as a guide, the present (Phase II) study focuses on devising and then demonstrating the effectiveness of performance-measuring techniques and equipment that show promise for detecting and trending the progress of such degradations before they reach a critical stage. Intrusive techniques requiring the addition of magnetic or acoustic sensors or the application of special test signals were investigated briefly, but major emphasis was placed on the examination of condition-indicating techniques that can be applied with minimal cost and impact on plant operation.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USNRC; Nuclear Regulatory Commission, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7295854
• Report Number(s): NUREG/CR-4819-Vol.2; ORNL/TM-12038-Vol.2; ON: TI92019024
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
NUCLEAR POWER PLANTS
VALVES
AGING
MONITORING
EVALUATION
MAINTENANCE
REACTOR SAFETY
RECOMMENDATIONS
SERVICE LIFE
SOLENOIDS
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
LIFETIME
NUCLEAR FACILITIES
POWER PLANTS
SAFETY
THERMAL POWER PLANTS
220200* - Nuclear Reactor Technology- Components & Accessories
220900 - Nuclear Reactor Technology- Reactor Safety