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Thursday, July 9, 2020 | History

4 edition of Evaluation of eddy current reliability from steam generator mock-up round-robin found in the catalog.

Evaluation of eddy current reliability from steam generator mock-up round-robin

Evaluation of eddy current reliability from steam generator mock-up round-robin

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Published by Division of Engineering Technology, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, For sale by the Supt. of Docs., U.S. G.P.O. in Washington, DC .
Written in English

    Subjects:
  • Steam-boiler inspection -- United States,
  • Eddy currents (Electric)

  • Edition Notes

    Statementprepared by D.S. Kupperman ... [et al.].
    ContributionsKupperman, D. S., U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Engineering Technology., Argonne National Laboratory.
    The Physical Object
    FormatMicroform
    Paginationxv, 94 p.
    Number of Pages94
    ID Numbers
    Open LibraryOL17620932M
    OCLC/WorldCa53137879

      Eddy current testing (ECT) method is widely used to detect various types of defects occurring in nuclear steam generator tubes. Therefore, the reliability of its detection and sizing accuracy for defects should be validated. For this purpose, two tubes with defect signals were pulled from an operating steam generator and destructively examined. Hence there is a strong economic incentive to develop reliable nondestructive evaluation (NDE) methods for steam generator tube inspection. Eddy current (EC) inspection has proved to be both fast and effective in detecting and sizing most of the degradation mechanisms that occurred in the early generators.

      For the integrity management of steam generator (SG) tubes, nondestructive evaluation performed using eddy current test (ECT) is necessary in the assessment. The reliability of ECT evaluation is dependent on the accuracy of ECT for various kinds of defects. Evaluation of NDE Round-Robin Exercises Using the NRC Steam Generator Mockup at. Also several tubes with eddy current indications had been pulled out from the steam generators to determine the acting degradation mechanism. Examination of removed tubes can provide opportunity to check the reliability of eddy current inspection using bobbin coil. Also there were tubes pulled out form SG with existing cracks.

    Degradation of nuclear steam generator (SG) tubes and support structures can result in a loss of reactor efficiency. Regular in-service inspection, by conventional eddy current testing (ECT), permits detection of cracks, measurement of wall loss, and identification of other SG tube degradation modes. However, ECT is challenged by overlapping degradation modes such as . Eddy current results have been compared to metallographic analysis results afterwards. 1 Introduction Eddy current testing method is the main method for steam generator tubes inspection on the present. The main objective of inspection is to detect the target form of degradation of all, or at least of most of the damaged tubes.


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Evaluation of eddy current reliability from steam generator mock-up round-robin Download PDF EPUB FB2

Evaluation of Eddy Current Reliability from Steam Generator Mock-Up Round-Robin By D. Kupperman, S. Bakhtiari, W. Shack, J. Park and S. Majumdar Abstract This report presents an independent assessment of steam generator (SG) inspection reliability that.

Abstract This report presents an independent assessment of steam generator (SG) inspection reliability that was developed through a nondestructive evaluation round-robin on a steam generator mock-up at Argonne National Laboratory (ANL).

The report does not establish regulatory position. A steam generator mock–up at Argonne National Laboratory (ANL) was used for this study. The goal of the round–robin was to assess the current state of in–service eddy–current inspection reliability for SG tubing, determine the probability of detection (POD) as a function of flaw size or severity, and assess the capability for sizing of flaws.

Eleven. Get this from a library. Evaluation of eddy current reliability from steam generator mock-up round-robin. [D S Kupperman; U.S. Nuclear Regulatory Commission.

Office of Nuclear Regulatory Research. Division of Engineering Technology.; Argonne National Laboratory.;]. The goal of the round–robin was to assess the current state of in–service eddy–current inspection reliability for SG tubing, determine the probability of detection (POD) as a function of flaw size or severity, and assess the capability for sizing of flaws.

Evaluation of Eddy Current Reliability from Steam Generator Mock-Up Round-Robin: NUREG/CR ANL/CANTIA: A Computer Code for Steam Generator Integrity Assessments: NUREG/CR Mechanism and Estimation of Fatigue Crack Initiation in Austenitic Stainless Steels in LWR Environments.

A steam generator mock-up has been assembled for round-robin (RR) studies of the effectiveness of currently practiced inservice inspection technology for detection of current-day flaws. The mock-up will also be used to evaluate emerging inspection technologies. The m (12 ft)-tall mock-up contains tube openings, each consisting of nine.

Muscara's 11 research works with citations and reads, including: Evaluation of NDE Round-Robin Exercises Using the NRC Steam Generator Mockup. A steam generator mock-up has been assembled for round-robin (RR) studies of the effectiveness of currently practiced inservice inspection technology for detection of current.

To demonstrate the round-robin test, a mock-up test was conducted by commercial in-service inspection (ISI) teams prior to round-robin tests on degraded steam generator tubes removed from service. There were 30 tubes made of Alloy MA in the mock-up, which contain   Highlights We confirmed defect detection performances of remote field eddy current testing.

It is difficult to inspect outer surface of double wall tube steam generator. We used coils with flux guide made of iron–nickel alloy for high sensitivity. Output voltage of detector coil increased more than times.

We were able to detect small hole defect of 1mm in. This paper discusses round-robin exercises to assess inspection reliability using the NRC steam generator (SG) mock-up at Argonne National Laboratory. The purpose of the round robins is to assess the current reliability of SG tubing.

An ECT round robin program using degraded tubes from a replaced steam generator of Kori unit one (The Second Interim Report), KEPRI. This paper discusses round-robin exercises using the NRC steam generator (SG) mock-up at Argonne National Laboratory to assess inspection reliability.

The purpose of the round robins was to assess the current reliability of SG tubing inservice inspection, determine the probability of detection (POD) as function of flaw size or severity, and assess the capability for sizing of.

reliability. Inspection and monitoring aimed at timely detection and characterization of the degradation is a key element for ensuring tube integrity. Up to the early’s, the in-service inspection of SG tubing was carried out using single-frequency eddy current testing (ET) bobbin coils, which were adequate.

This paper discusses round-robin exercises to assess inspection reliability using the NRC steam generator (SG) mock-up at Argonne National Laboratory. The purpose of the round robins is to assess the current reliability of SG tubing inservice inspection, determine the probability of detection (POD) as function of flaw size or severity, and assess the capability for.

@article{osti_, title = {STEAM GENERATOR GROUP PROJECT}, author = {Clark, R. and Lewis, M}, abstractNote = {This report is a summary of progress in the Surry Steam Generator Group Project for Information is presented on the analysis of two baseline eddy current inspections of the generator.

Round robin series of tests using standard in-service. History. Eddy current testing (ECT) as a technique for testing finds its roots in electromagnetism.

Eddy currents were first observed by François Arago inbut French physicist Léon Foucault is credited with discovering them in ECT began largely as a result of the English scientist Michael Faraday's discovery of electromagnetic induction in Eddy current testing (ECT) method is widely used to detect various types of defects occurring in nuclear steam generator tubes.

Therefore, the reliability. A steam generator mock–up at Argonne National Laboratory (ANL) was used for this study. The goal of the round–robin was to assess the current state of in–service eddy–current inspection reliability for SG tubing, determine the probability of detection (POD) as a function of flaw size or severity, and assess the capability for sizing of.

The results of the NDEs will be validated by inspection and destruc- tive evaluation of degraded tubing. The work performed under this task will focus on round-robin (RR) tests by commercial ISI teams on degraded steam generator tubing. The RR tests will include both eddy current and ultra- sonic methods.Evaluation of POD Effect by Steam Generator Chemical Cleaning Kyungmun Joo 1, Dongman Shin 1, Yongseok Kang 1, Steam Generator Chemical Cleaning, Eddy Current Test, Probability of detection (POD) 1.

Introduction becomes a log-logistic function and is usually used for analyzing the detection reliability.industry utilizes for analyzing eddy current signals.

Argonne National Laboratory performed this evaluation on a mock-up steam generator tube assembly. This mock-up was constructed prior to this study and inspected with bobbin coil and motorized rotating pancake probes.

The mock.