A method and apparatus for tube crevice detection and measurement

Kikta, T J; Mitchell, R D

Title: A method and apparatus for tube crevice detection and measurement

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Abstract

This invention relates to a method and apparatus for determining the extent of contact between an electrically conducting tube and an electrically conductive tubesheet surrounding the tube, based upon the electrical resistance of the tube and tubesheet. A constant current source is applied to the interior of the electrically conducting tube by probes and a voltmeter is connected between other probes to measure the voltage at the point of current injection, which is inversely proportional to the amount of contact between the tube and tubesheet. Namely, the higher the voltage measured by the voltmeter, the less contact between the tube and tubesheet.

Inventors:: Kikta, T J; Mitchell, R D

Publication Date:: Tue Dec 31 00:00:00 EST 1991

Research Org.:: Westinghouse Electric Corp., Pittsburgh, PA (United States). Bettis Atomic Power Div.

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 10162719

Patent Number(s):: PATENTS-US-A7707538

Application Number:: ON: DE93015701; PAN: 7-707,538

Assignee:: Dept. of Energy

DOE Contract Number:: AC11-76PN00014

Resource Type:: Patent Application

Resource Relation:: Other Information: PBD: 1991

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; 20 FOSSIL-FUELED POWER PLANTS; ELECTRIC CONDUCTIVITY; MEASURING METHODS; MEASURING INSTRUMENTS; DESIGN; STEAM GENERATORS; TUBES; INVENTIONS; HEAT EXCHANGERS; 440800; 200104; MISCELLANEOUS INSTRUMENTATION; COMPONENTS

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                    Kikta, T J, and Mitchell, R D. A method and apparatus for tube crevice detection and measurement.  United States: N. p., 1991. 
        Web.

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                    Kikta, T J, & Mitchell, R D. A method and apparatus for tube crevice detection and measurement.  United States.

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                    Kikta, T J, and Mitchell, R D. 1991.  
        "A method and apparatus for tube crevice detection and measurement".  United States.

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@article{osti_10162719,

  title        = {A method and apparatus for tube crevice detection and measurement},

  author       = {Kikta, T J and Mitchell, R D},

  abstractNote = {This invention relates to a method and apparatus for determining the extent of contact between an electrically conducting tube and an electrically conductive tubesheet surrounding the tube, based upon the electrical resistance of the tube and tubesheet. A constant current source is applied to the interior of the electrically conducting tube by probes and a voltmeter is connected between other probes to measure the voltage at the point of current injection, which is inversely proportional to the amount of contact between the tube and tubesheet. Namely, the higher the voltage measured by the voltmeter, the less contact between the tube and tubesheet.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/10162719},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Dec 31 00:00:00 EST 1991},

  month        = {Tue Dec 31 00:00:00 EST 1991}

}

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