Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld

    Research output: Contribution to conferenceOther conference contributionScientificpeer-review

    Abstract

    Qualification of non-destructive examination (NDE) procedures for in-service inspections (ISI) of nuclear power plant (NPP) components is performed using different types of artificial defects. The assessment of the reliability of a procedure requires representative defects compared to the real service-induced defects.
    Artificial defects are typically used as a reference when the performance of an NDE procedure is demonstrated. Because of the lack of real defects, artificial defects are needed for certification and training of the inspectors. The NPP safety regulatory guides in Finland (YVL) emphasise that the description of defect indications exceeding the recording level shall be given in the inspection report. This information includes definition of defect size, character, location and orientation according to ASME Code, Section XI “Rules for in-service inspection of nuclear power plant components” and their comparison with the acceptance level. This code imposes some rules on the applicable defect types and it is thus important to verify the applicability of different available defects.
    Ultrasonic indications are highly dependent on defect characteristics like roughness, crack opening, tilt and branching. This work studies the influence of different reflector properties on defect indications. Five inside surface breaking artificially produced fatigue cracks beside the weld root and one electric discharge machining (EDM) reference notch were made in a piping test specimen simulating PWR cooling line pipe (AISI 321). Defects were examined using phased array ultrasonic testing (PAUT).
    This study was made as a part of Finnish national research program on NPP safety 2014-2018 (SAFIR2018), Non-destructive examination of NPP primary circuit components and concrete infrastructure, WANDA project.

    Original languageEnglish
    Publication statusPublished - Jun 2018
    MoE publication typeNot Eligible
    Event12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components
    - Dubrovnik, Croatia
    Duration: 4 Oct 20166 Oct 2016

    Conference

    Conference12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components
    Abbreviated titleJRC-NDE 2016
    CountryCroatia
    CityDubrovnik
    Period4/10/166/10/16

    Fingerprint

    Austenitic stainless steel
    Welds
    Ultrasonics
    Defects
    Nuclear power plants
    Nondestructive examination
    Inspection
    Fatigue cracks
    Ultrasonic testing
    Electric discharge machining
    Surface roughness
    Pipe
    Concretes
    Cooling

    Keywords

    • ultrasonic testing (UT)
    • phased array (PA)

    Cite this

    Koskinen, A., & Leskelä, E. (2018). Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld. 12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components
    , Dubrovnik, Croatia.
    Koskinen, Ari ; Leskelä, Esa. / Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld. 12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components
    , Dubrovnik, Croatia.
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    title = "Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld",
    abstract = "Qualification of non-destructive examination (NDE) procedures for in-service inspections (ISI) of nuclear power plant (NPP) components is performed using different types of artificial defects. The assessment of the reliability of a procedure requires representative defects compared to the real service-induced defects. Artificial defects are typically used as a reference when the performance of an NDE procedure is demonstrated. Because of the lack of real defects, artificial defects are needed for certification and training of the inspectors. The NPP safety regulatory guides in Finland (YVL) emphasise that the description of defect indications exceeding the recording level shall be given in the inspection report. This information includes definition of defect size, character, location and orientation according to ASME Code, Section XI “Rules for in-service inspection of nuclear power plant components” and their comparison with the acceptance level. This code imposes some rules on the applicable defect types and it is thus important to verify the applicability of different available defects.Ultrasonic indications are highly dependent on defect characteristics like roughness, crack opening, tilt and branching. This work studies the influence of different reflector properties on defect indications. Five inside surface breaking artificially produced fatigue cracks beside the weld root and one electric discharge machining (EDM) reference notch were made in a piping test specimen simulating PWR cooling line pipe (AISI 321). Defects were examined using phased array ultrasonic testing (PAUT).This study was made as a part of Finnish national research program on NPP safety 2014-2018 (SAFIR2018), Non-destructive examination of NPP primary circuit components and concrete infrastructure, WANDA project.",
    keywords = "ultrasonic testing (UT), phased array (PA)",
    author = "Ari Koskinen and Esa Leskel{\"a}",
    year = "2018",
    month = "6",
    language = "English",
    note = "12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components<br/>, JRC-NDE 2016 ; Conference date: 04-10-2016 Through 06-10-2016",

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    Koskinen, A & Leskelä, E 2018, 'Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld' 12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components
    , Dubrovnik, Croatia, 4/10/16 - 6/10/16, .

    Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld. / Koskinen, Ari; Leskelä, Esa.

    2018. 12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components
    , Dubrovnik, Croatia.

    Research output: Contribution to conferenceOther conference contributionScientificpeer-review

    TY - CONF

    T1 - Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld

    AU - Koskinen, Ari

    AU - Leskelä, Esa

    PY - 2018/6

    Y1 - 2018/6

    N2 - Qualification of non-destructive examination (NDE) procedures for in-service inspections (ISI) of nuclear power plant (NPP) components is performed using different types of artificial defects. The assessment of the reliability of a procedure requires representative defects compared to the real service-induced defects. Artificial defects are typically used as a reference when the performance of an NDE procedure is demonstrated. Because of the lack of real defects, artificial defects are needed for certification and training of the inspectors. The NPP safety regulatory guides in Finland (YVL) emphasise that the description of defect indications exceeding the recording level shall be given in the inspection report. This information includes definition of defect size, character, location and orientation according to ASME Code, Section XI “Rules for in-service inspection of nuclear power plant components” and their comparison with the acceptance level. This code imposes some rules on the applicable defect types and it is thus important to verify the applicability of different available defects.Ultrasonic indications are highly dependent on defect characteristics like roughness, crack opening, tilt and branching. This work studies the influence of different reflector properties on defect indications. Five inside surface breaking artificially produced fatigue cracks beside the weld root and one electric discharge machining (EDM) reference notch were made in a piping test specimen simulating PWR cooling line pipe (AISI 321). Defects were examined using phased array ultrasonic testing (PAUT).This study was made as a part of Finnish national research program on NPP safety 2014-2018 (SAFIR2018), Non-destructive examination of NPP primary circuit components and concrete infrastructure, WANDA project.

    AB - Qualification of non-destructive examination (NDE) procedures for in-service inspections (ISI) of nuclear power plant (NPP) components is performed using different types of artificial defects. The assessment of the reliability of a procedure requires representative defects compared to the real service-induced defects. Artificial defects are typically used as a reference when the performance of an NDE procedure is demonstrated. Because of the lack of real defects, artificial defects are needed for certification and training of the inspectors. The NPP safety regulatory guides in Finland (YVL) emphasise that the description of defect indications exceeding the recording level shall be given in the inspection report. This information includes definition of defect size, character, location and orientation according to ASME Code, Section XI “Rules for in-service inspection of nuclear power plant components” and their comparison with the acceptance level. This code imposes some rules on the applicable defect types and it is thus important to verify the applicability of different available defects.Ultrasonic indications are highly dependent on defect characteristics like roughness, crack opening, tilt and branching. This work studies the influence of different reflector properties on defect indications. Five inside surface breaking artificially produced fatigue cracks beside the weld root and one electric discharge machining (EDM) reference notch were made in a piping test specimen simulating PWR cooling line pipe (AISI 321). Defects were examined using phased array ultrasonic testing (PAUT).This study was made as a part of Finnish national research program on NPP safety 2014-2018 (SAFIR2018), Non-destructive examination of NPP primary circuit components and concrete infrastructure, WANDA project.

    KW - ultrasonic testing (UT)

    KW - phased array (PA)

    M3 - Other conference contribution

    ER -

    Koskinen A, Leskelä E. Phased Array Ultrasonic Sizing Performance on Artificially Produced Fatigue Cracks in Austenitic Stainless Steel Weld. 2018. 12th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components
    , Dubrovnik, Croatia.