Ultrasonic studies on iter divertor and first wall prototype modules

Jorma Pitkänen, Pentti Kauppinen, Harri Jeskanen, Seppo Tähtinen, Stefan Sandlin

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

    Abstract

    Blanket and divertor components of ITER are complicated in design and reliable reactor operation sets special requirements on applied manufacturing methods and on quality and integrity assessment methods. R&D programmes have been implemented to develop suitable nondestructive testing method as a part of ITER Primary First Wall and Divertor component manufacturing programmes. The suitability of several nondestructive testing methods have been evaluated i.e. ultrasonic inspection, eddy current, X-ray, infrared thermography and leak testing during different manufacturing stages as a quality assurance method and after thermal fatigue tests as an integrity assessment method. In this study ultrasonic methods have been applied to evaluate structural integrity of several ITER Primary First Wall and Divertor Vertical Target mock-ups before and after thermal fatigue and high heat flux tests. The techniques used were leaky Rayleigh wave and longitudinal wave reflection techniques. The applicability of ultrasonic methods was evaluated by using small scale mock-ups with artificial manufacturing defects on different interfaces. In addition to outer surfaces of the mock-ups several dissimilar metal planar and tubular interfaces have been examined i.e. Be and Cu surfaces and Be/Cu, Cu/Cu, Cu/Stain-less steel, W/Cu and CfC/Cu interfaces. The ultrasonic examinations were carried out before and after cyclic thermal loading for ITER Primary First Wall mock-ups up to 4 MWm-2 and for ITER Divertor Vertical Target mock-up up to 15 MWm-2. The leaky Rayleigh wave technique was used to detect surface defects and interface defects in different joints. The longitudinal wave reflection was used only for interface defects. New probes were designed for inspection tasks. The NDT methods are compared briefly in this paper as well as the accuracy of detecting defects with ultrasonic testing methods.
    Original languageEnglish
    Title of host publication22nd Symposium on Fusion Technology
    Subtitle of host publicationBook of Abstracts
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages78-78
    ISBN (Electronic)951-38-5731-X
    ISBN (Print)951-38-5730-1
    Publication statusPublished - 2002
    Event22nd Symposium on Fusion Technology - Helsinki, Finland
    Duration: 9 Sep 200213 Sep 2002
    Conference number: 22

    Publication series

    SeriesVTT Symposium
    Number220
    ISSN0357-9387

    Conference

    Conference22nd Symposium on Fusion Technology
    Abbreviated titleSOFTA
    CountryFinland
    CityHelsinki
    Period9/09/0213/09/02

    Fingerprint

    modules
    ultrasonics
    prototypes
    manufacturing
    integrity
    thermal fatigue
    wave reflection
    longitudinal waves
    defects
    Rayleigh waves
    inspection
    fatigue tests
    blankets
    assurance
    surface defects
    eddy currents
    heat flux
    examination
    reactors
    steels

    Cite this

    Pitkänen, J., Kauppinen, P., Jeskanen, H., Tähtinen, S., & Sandlin, S. (2002). Ultrasonic studies on iter divertor and first wall prototype modules. In 22nd Symposium on Fusion Technology: Book of Abstracts (pp. 78-78). [B-36] Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 220
    Pitkänen, Jorma ; Kauppinen, Pentti ; Jeskanen, Harri ; Tähtinen, Seppo ; Sandlin, Stefan. / Ultrasonic studies on iter divertor and first wall prototype modules. 22nd Symposium on Fusion Technology: Book of Abstracts. Espoo : VTT Technical Research Centre of Finland, 2002. pp. 78-78 (VTT Symposium; No. 220).
    @inbook{38a1f0fddb654cb69f6abc7719b99fe3,
    title = "Ultrasonic studies on iter divertor and first wall prototype modules",
    abstract = "Blanket and divertor components of ITER are complicated in design and reliable reactor operation sets special requirements on applied manufacturing methods and on quality and integrity assessment methods. R&D programmes have been implemented to develop suitable nondestructive testing method as a part of ITER Primary First Wall and Divertor component manufacturing programmes. The suitability of several nondestructive testing methods have been evaluated i.e. ultrasonic inspection, eddy current, X-ray, infrared thermography and leak testing during different manufacturing stages as a quality assurance method and after thermal fatigue tests as an integrity assessment method. In this study ultrasonic methods have been applied to evaluate structural integrity of several ITER Primary First Wall and Divertor Vertical Target mock-ups before and after thermal fatigue and high heat flux tests. The techniques used were leaky Rayleigh wave and longitudinal wave reflection techniques. The applicability of ultrasonic methods was evaluated by using small scale mock-ups with artificial manufacturing defects on different interfaces. In addition to outer surfaces of the mock-ups several dissimilar metal planar and tubular interfaces have been examined i.e. Be and Cu surfaces and Be/Cu, Cu/Cu, Cu/Stain-less steel, W/Cu and CfC/Cu interfaces. The ultrasonic examinations were carried out before and after cyclic thermal loading for ITER Primary First Wall mock-ups up to 4 MWm-2 and for ITER Divertor Vertical Target mock-up up to 15 MWm-2. The leaky Rayleigh wave technique was used to detect surface defects and interface defects in different joints. The longitudinal wave reflection was used only for interface defects. New probes were designed for inspection tasks. The NDT methods are compared briefly in this paper as well as the accuracy of detecting defects with ultrasonic testing methods.",
    author = "Jorma Pitk{\"a}nen and Pentti Kauppinen and Harri Jeskanen and Seppo T{\"a}htinen and Stefan Sandlin",
    year = "2002",
    language = "English",
    isbn = "951-38-5730-1",
    series = "VTT Symposium",
    publisher = "VTT Technical Research Centre of Finland",
    number = "220",
    pages = "78--78",
    booktitle = "22nd Symposium on Fusion Technology",
    address = "Finland",

    }

    Pitkänen, J, Kauppinen, P, Jeskanen, H, Tähtinen, S & Sandlin, S 2002, Ultrasonic studies on iter divertor and first wall prototype modules. in 22nd Symposium on Fusion Technology: Book of Abstracts., B-36, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 220, pp. 78-78, 22nd Symposium on Fusion Technology, Helsinki, Finland, 9/09/02.

    Ultrasonic studies on iter divertor and first wall prototype modules. / Pitkänen, Jorma; Kauppinen, Pentti; Jeskanen, Harri; Tähtinen, Seppo; Sandlin, Stefan.

    22nd Symposium on Fusion Technology: Book of Abstracts. Espoo : VTT Technical Research Centre of Finland, 2002. p. 78-78 B-36 (VTT Symposium; No. 220).

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

    TY - CHAP

    T1 - Ultrasonic studies on iter divertor and first wall prototype modules

    AU - Pitkänen, Jorma

    AU - Kauppinen, Pentti

    AU - Jeskanen, Harri

    AU - Tähtinen, Seppo

    AU - Sandlin, Stefan

    PY - 2002

    Y1 - 2002

    N2 - Blanket and divertor components of ITER are complicated in design and reliable reactor operation sets special requirements on applied manufacturing methods and on quality and integrity assessment methods. R&D programmes have been implemented to develop suitable nondestructive testing method as a part of ITER Primary First Wall and Divertor component manufacturing programmes. The suitability of several nondestructive testing methods have been evaluated i.e. ultrasonic inspection, eddy current, X-ray, infrared thermography and leak testing during different manufacturing stages as a quality assurance method and after thermal fatigue tests as an integrity assessment method. In this study ultrasonic methods have been applied to evaluate structural integrity of several ITER Primary First Wall and Divertor Vertical Target mock-ups before and after thermal fatigue and high heat flux tests. The techniques used were leaky Rayleigh wave and longitudinal wave reflection techniques. The applicability of ultrasonic methods was evaluated by using small scale mock-ups with artificial manufacturing defects on different interfaces. In addition to outer surfaces of the mock-ups several dissimilar metal planar and tubular interfaces have been examined i.e. Be and Cu surfaces and Be/Cu, Cu/Cu, Cu/Stain-less steel, W/Cu and CfC/Cu interfaces. The ultrasonic examinations were carried out before and after cyclic thermal loading for ITER Primary First Wall mock-ups up to 4 MWm-2 and for ITER Divertor Vertical Target mock-up up to 15 MWm-2. The leaky Rayleigh wave technique was used to detect surface defects and interface defects in different joints. The longitudinal wave reflection was used only for interface defects. New probes were designed for inspection tasks. The NDT methods are compared briefly in this paper as well as the accuracy of detecting defects with ultrasonic testing methods.

    AB - Blanket and divertor components of ITER are complicated in design and reliable reactor operation sets special requirements on applied manufacturing methods and on quality and integrity assessment methods. R&D programmes have been implemented to develop suitable nondestructive testing method as a part of ITER Primary First Wall and Divertor component manufacturing programmes. The suitability of several nondestructive testing methods have been evaluated i.e. ultrasonic inspection, eddy current, X-ray, infrared thermography and leak testing during different manufacturing stages as a quality assurance method and after thermal fatigue tests as an integrity assessment method. In this study ultrasonic methods have been applied to evaluate structural integrity of several ITER Primary First Wall and Divertor Vertical Target mock-ups before and after thermal fatigue and high heat flux tests. The techniques used were leaky Rayleigh wave and longitudinal wave reflection techniques. The applicability of ultrasonic methods was evaluated by using small scale mock-ups with artificial manufacturing defects on different interfaces. In addition to outer surfaces of the mock-ups several dissimilar metal planar and tubular interfaces have been examined i.e. Be and Cu surfaces and Be/Cu, Cu/Cu, Cu/Stain-less steel, W/Cu and CfC/Cu interfaces. The ultrasonic examinations were carried out before and after cyclic thermal loading for ITER Primary First Wall mock-ups up to 4 MWm-2 and for ITER Divertor Vertical Target mock-up up to 15 MWm-2. The leaky Rayleigh wave technique was used to detect surface defects and interface defects in different joints. The longitudinal wave reflection was used only for interface defects. New probes were designed for inspection tasks. The NDT methods are compared briefly in this paper as well as the accuracy of detecting defects with ultrasonic testing methods.

    M3 - Conference abstract in proceedings

    SN - 951-38-5730-1

    T3 - VTT Symposium

    SP - 78

    EP - 78

    BT - 22nd Symposium on Fusion Technology

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Pitkänen J, Kauppinen P, Jeskanen H, Tähtinen S, Sandlin S. Ultrasonic studies on iter divertor and first wall prototype modules. In 22nd Symposium on Fusion Technology: Book of Abstracts. Espoo: VTT Technical Research Centre of Finland. 2002. p. 78-78. B-36. (VTT Symposium; No. 220).