Aging and service wear of air-operated valves used in safety-related systems at nuclear power plants

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Description

Air-operated valves (AOVs) are used in a variety of safety-related applications at nuclear power plants. They are often used where rapid stroke times are required or precise control of the valve obturator is required. They can be designed to operate automatically upon loss of power, which is often desirable when selecting components for response to design basis conditions. The purpose of this report is to examine the reported failures of AOVs and determine whether there are identifiable trends in the failures related to predictable causes. This report examines the specific components that comprise a typical AOV, how those components fail, ... continued below

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72 p.

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Cox, D. F.; McElhaney, K. L. & Staunton, R. H. May 1, 1995.

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Description

Air-operated valves (AOVs) are used in a variety of safety-related applications at nuclear power plants. They are often used where rapid stroke times are required or precise control of the valve obturator is required. They can be designed to operate automatically upon loss of power, which is often desirable when selecting components for response to design basis conditions. The purpose of this report is to examine the reported failures of AOVs and determine whether there are identifiable trends in the failures related to predictable causes. This report examines the specific components that comprise a typical AOV, how those components fail, when they fail, and how such failures are discovered. It also examines whether current testing frequencies and methods are effective in predicting such failures.

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72 p.

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INIS; OSTI as TI95012813

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  • Other Information: PBD: May 1995

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  • Other: TI95012813
  • Report No.: NUREG/CR--6016
  • Report No.: ORNL--6748
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/94555 | External Link
  • Office of Scientific & Technical Information Report Number: 94555
  • Archival Resource Key: ark:/67531/metadc794849

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • April 8, 2016, 8:02 p.m.

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Cox, D. F.; McElhaney, K. L. & Staunton, R. H. Aging and service wear of air-operated valves used in safety-related systems at nuclear power plants, report, May 1, 1995; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc794849/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.