SE8004469L - SET AND DEVICE FOR DETECTING MAGNETIC PROVISIONS - Google Patents

SET AND DEVICE FOR DETECTING MAGNETIC PROVISIONS

Info

Publication number
SE8004469L
SE8004469L SE8004469A SE8004469A SE8004469L SE 8004469 L SE8004469 L SE 8004469L SE 8004469 A SE8004469 A SE 8004469A SE 8004469 A SE8004469 A SE 8004469A SE 8004469 L SE8004469 L SE 8004469L
Authority
SE
Sweden
Prior art keywords
magnetic
tubes
probe
provisions
measuring
Prior art date
Application number
SE8004469A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
W Lord
Original Assignee
Electric Power Res Inst
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electric Power Res Inst filed Critical Electric Power Res Inst
Publication of SE8004469L publication Critical patent/SE8004469L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Deposits of magnetite on tubes 82 in a heat exchanger, e.g. a steam generator, are detected by measuring the magnetic reluctance within the tubes. A probe 84 for measuring the reluctance includes a permanent magnet (or a magnetic core and an excitation coil would on the core 88, 92) and a magnetic flux detector such as a Hall generator mounted for example on one of the non-magnetic rings 90. Changes in flux density as the probe is pushed through the tubes are detected by the Hall generator, thus indicating the presence of magnetite deposits. The probe includes a non-magnetic tube 86 for pushing it through the heat exchanger tubes. <IMAGE>
SE8004469A 1979-06-18 1980-06-17 SET AND DEVICE FOR DETECTING MAGNETIC PROVISIONS SE8004469L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4972379A 1979-06-18 1979-06-18

Publications (1)

Publication Number Publication Date
SE8004469L true SE8004469L (en) 1980-12-19

Family

ID=21961341

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8004469A SE8004469L (en) 1979-06-18 1980-06-17 SET AND DEVICE FOR DETECTING MAGNETIC PROVISIONS

Country Status (7)

Country Link
JP (1) JPS566178A (en)
BE (1) BE883851A (en)
CA (1) CA1162987A (en)
DE (1) DE3022060A1 (en)
FR (1) FR2459490A1 (en)
GB (1) GB2055473B (en)
SE (1) SE8004469L (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159954A (en) * 1984-06-06 1985-12-11 British Gas Corp Apparatus, system and method for detecting a discontinuity in a pipe or conduit
FR2927723B1 (en) * 2008-02-18 2010-12-10 Areva Np DEVICE AND METHOD FOR DETECTING AND MEASURING THE WATER PASSAGE CLOSURE RATE IN A SECONDARY CIRCUIT OF A PRESSURIZED WATER NUCLEAR REACTOR
FR2928024B1 (en) * 2008-02-22 2010-12-10 Areva Np DEVICE AND METHOD FOR DETECTING AND MEASURING THE WATER PASSAGE CLOSURE RATE IN A SECONDARY CIRCUIT OF A PRESSURIZED WATER NUCLEAR REACTOR
FR2931241B1 (en) * 2008-05-16 2010-05-28 Electricite De France METHOD AND DEVICE FOR DETECTING DEPOSITS COMPRISING AT LEAST ONE FERROMAGNETIC MATERIAL ON OR NEAR THE OUTER WALL OF A TUBE
FR2950434B1 (en) 2009-09-24 2011-11-25 Electricite De France IMPROVEMENTS IN DETECTION OF DEPOSITS COMPRISING AT LEAST ONE FERROMAGNETIC MATERIAL ON OR NEAR THE OUTER WALL OF A TUBE
FR2950432B1 (en) 2009-09-24 2015-06-05 Electricite De France METHODS AND DEVICES FOR DETECTING DEPOSITS IN INTERSTICES OF A CONNECTION BETWEEN A TUBE AND A PLATE
FR2950433B1 (en) 2009-09-24 2014-12-19 Electricite De France IMPROVEMENTS IN A METHOD AND DEVICE FOR DETECTING DEPOSITS COMPRISING AT LEAST ONE FERROMAGNETIC MATERIAL ON OR NEAR THE OUTER WALL OF A TUBE
FR2960336B1 (en) * 2010-05-19 2012-06-22 Areva Np ASSEMBLY AND METHOD FOR DETECTING AND MEASURING THE WATER PASSAGE CLOSURE RATE IN A SECONDARY CIRCUIT OF A PRESSURIZED WATER NUCLEAR REACTOR
JP5791279B2 (en) * 2011-01-06 2015-10-07 三菱重工業株式会社 Deposit measuring apparatus, deposit measuring method, and deposit measuring program
FR3015757B1 (en) * 2013-12-23 2019-05-31 Electricite De France METHOD FOR QUANTITATIVE ESTIMATING OF THE PLATE COATING OF A STEAM GENERATOR
FR3028042B1 (en) 2014-11-05 2016-12-16 Electricite De France DEVICE AND METHOD FOR DETECTING DEPOSITS OF AT LEAST ONE FERROMAGNETIC MATERIAL ON THE OUTER WALL OF A TUBE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU439594B2 (en) * 1970-01-12 1973-08-20 Joseph Lucas (Industries) Limited Magnetic probe
US3906358A (en) * 1973-11-12 1975-09-16 Combustion Eng Probe train including a flaw detector and a radiation responsive recording means with alignment means having a natural curved cast
JPS5094987A (en) * 1973-12-22 1975-07-29
US4088946A (en) * 1975-07-28 1978-05-09 Westinghouse Electric Corp. Magnetic bridge transducer formed with permanent magnets and a hall effect sensor for identifying the presence and location of ferromagnetic discontinuities within or on a tubular specimen
US4194149A (en) * 1977-12-15 1980-03-18 The Babcock & Wilcox Company Method for generating the eddy current signature of a flaw in a tube proximate a contiguous member which obscures the flaw signal

Also Published As

Publication number Publication date
FR2459490A1 (en) 1981-01-09
DE3022060A1 (en) 1981-01-22
GB2055473A (en) 1981-03-04
BE883851A (en) 1980-10-16
JPS566178A (en) 1981-01-22
GB2055473B (en) 1984-01-25
CA1162987A (en) 1984-02-28

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