Aging and defect characterization of motor-operated valves: progress based on NPAR strategy. [PWR; BWR]

Eissenberg, D M

Title: Aging and defect characterization of motor-operated valves: progress based on NPAR strategy. [PWR; BWR]

Full Record
Other Related Research

Abstract

The Nuclear Plant Aging Research (NPAR) program strategy is directed at carrying out comprehensive aging assessments in order to define and resolve issues related to aging (including service wear) of electrical and mechanical components and structures at operating reactor facilities and their possible impact on plant safety. This paper describes work recently completed at Oak Ridge National Laboratory which applied the NPAR strategy to motor-operated valves (MOVs). The objective of the work was primarily to develop an understanding of the operating history and conditions and the failure modes of MOVs in nuclear plant service as a preliminary to identifying and recommending methods for trending aging degradation. A second objective was to demonstrate, using MOVs as an example, that the NPAR strategy can be applied to many electrical and mechanical components of nuclear power plants.

Authors:: Eissenberg, D M

Publication Date:: Sun Jan 01 00:00:00 EST 1984

Research Org.:: Oak Ridge National Lab., TN (USA)

OSTI Identifier:: 6029076

Report Number(s):: CONF-8410142-44
ON: DE85003538

DOE Contract Number:: AC05-84OR21400

Resource Type:: Conference

Resource Relation:: Conference: 12. water reactor safety research information meeting, Gaithersburg, MD, USA, 23 Oct 1984

Country of Publication:: United States

Language:: English

Subject:: 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; BWR TYPE REACTORS; VALVES; PWR TYPE REACTORS; PERFORMANCE; DEFECTS; ELECTRIC MOTORS; FAILURES; CONTROL EQUIPMENT; EQUIPMENT; FLOW REGULATORS; MOTORS; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 210100* - Power Reactors, Nonbreeding, Light-Water Moderated, Boiling Water Cooled; 210200 - Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled

Citation Formats


                    Eissenberg, D M. Aging and defect characterization of motor-operated valves: progress based on NPAR strategy. [PWR; BWR].  United States: N. p., 1984. 
        Web.

Copy to clipboard


                    Eissenberg, D M. Aging and defect characterization of motor-operated valves: progress based on NPAR strategy. [PWR; BWR].  United States.

Copy to clipboard


                    Eissenberg, D M. 1984.  
        "Aging and defect characterization of motor-operated valves: progress based on NPAR strategy. [PWR; BWR]".  United States.  https://www.osti.gov/servlets/purl/6029076.

Copy to clipboard


                    
@article{osti_6029076,

  title        = {Aging and defect characterization of motor-operated valves: progress based on NPAR strategy. [PWR; BWR]},

  author       = {Eissenberg, D M},

  abstractNote = {The Nuclear Plant Aging Research (NPAR) program strategy is directed at carrying out comprehensive aging assessments in order to define and resolve issues related to aging (including service wear) of electrical and mechanical components and structures at operating reactor facilities and their possible impact on plant safety. This paper describes work recently completed at Oak Ridge National Laboratory which applied the NPAR strategy to motor-operated valves (MOVs). The objective of the work was primarily to develop an understanding of the operating history and conditions and the failure modes of MOVs in nuclear plant service as a preliminary to identifying and recommending methods for trending aging degradation. A second objective was to demonstrate, using MOVs as an example, that the NPAR strategy can be applied to many electrical and mechanical components of nuclear power plants.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6029076},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sun Jan 01 00:00:00 EST 1984},

  month        = {Sun Jan 01 00:00:00 EST 1984}

}

Copy to clipboard

Conference:

View Conference (0.28 MB)

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Aging and service wear of electric motor-operated valves used in engineered safety-feature systems of nuclear power plants: Aging assessments and monitoring method evaluations

Technical Report Haynes, H

Motor-operated valves (MOVs) are located in almost all plant fluid systems. Their failures have resulted in significant plant maintenance efforts. More important, the operational readiness if nuclear plant safety-related systems has often been affected by MOV degradation and failure. Thus, in recent years MOVs have received considerable attention by the Nuclear Regulatory Commission and the nuclear power industry and were identified as a component for study by the Nuclear Plant Aging Research (NPAR) Program. In support of the NPAR Program, a comprehensive Phase II aging assessment on MOVs was performed by the Oak Ridge National Laboratory (ORNL), and the resultsmore »« less
Operating experience and aging-seismic assessment of electric motors

Technical Report Subudhi, M; Burns, E; Taylor, J

Objectives of this program are to identify concerns related to the aging and service wear of equipment operating in nuclear power plants, to assess their possible impact on plant safety, to identify effective inspection surveillance and monitoring methods and to recommend suitable maintenance practices for mitigating aging related concerns and diminish the rate of degradation due to aging and service wear. Motor design and materials of construction are reviewed to identify age-sensitive components. Operational and accidental stressors are determined, and their effect on promoting aging degradation is assessed. Failure modes, mechanisms, and causes have been reviewed from operating experiences andmore »« less
Status of motor operated valves aging assessment

Conference Eissenberg, D

Motor operated valves (MOVs) have a long history of operational problems in nuclear power plants. Resolution of MOV problems in the past has tended to focus on symptoms rather than root cause. Although there has been more attention focused recently on identifying root causes, problems with valve operational readiness resulting from aging and service wear still persist. In addition, weaknesses in the currently used design equations for sizing of MOVs, identified in tests carried out by industry and confirmed in the recent NRC gate valve blowdown testing, have re-enforced the need for improved in-situ methods for determining the operational readinessmore »« less
Full Text Available
Aging and service wear of electric motor-operated valves used in engineered safety-feature systems of nuclear power plants. Volume 1

Technical Report Greenstreet, W.; Murphy, G.; Eissenberg, D.

This is the first in a series of three reports on electric motor-operated valves (MOVs) to be produced under the US Nuclear Regulatory Commission's Nuclear Plant Aging Research program. This program addresses the evaluation and identification of practical and cost-effective methods for detecting, monitoring, and assessing the severity of time-dependent degradation (aging and service wear) of MOVs in nuclear plants. These methods are to provide capabilities for establishing degradation trends prior to failure and developing guidance for effective maintenance. This report examines failure modes and causes resulting from aging and service wear, manufacturer-recommended maintenance and surveillance practices, and measurable parametersmore »« less
https://doi.org/10.2172/6495622

Full Text Available
Pre-Phase 1 Aging Assessment of the BWR and PWR Accumulators

Technical Report Buckely, G.

Accumulators are important components used in many systems at commercial boiling water reactors (BWRs) and pressurized water reactors in the United States. The accumulators are vessels attached to fluid systems to provide 1) a limited backup source of stored fluid energy for hydraulic/pneumatic mechanical equipment, 2) a damping effect on pressure pulses in fluid systems, and 3) a volume of fluid to be injected passively into a fluid system. Accumulators contain a gas that is compressed or expanded as the fluid from the system enters or exits the accumulator. The gas and fluid in accumulators are usually separated from eachmore »« less
https://doi.org/10.2172/1105008

Full Text Available

Similar Records