Development of nondestructive techniques for fuel cladding evaluation in hot cell

Tarja Jäppinen, Stefan Sandlin

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

    Abstract

    In nuclear light water reactors (LWR), an effective heat transfer from the fuel through the fuel cladding to the water in the reactor is essential. Furthermore, the cladding should prevent the radionuclides in the fuel from contaminating the reactor circuit. During service the cladding suffers from damage by corrosion, microstructural changes, hydrogen pick-up, creep etc. Regular nondestructive evaluation in a hot cell is a relatively new complement to laborious destructive evaluation of in-service degradation of irradiated material. In this work the possibilities of laser ultrasonics and eddy current techniques in hot cells are presented. The main emphasis is on oxide thickness measurements and on detection of cracks and delaminations for oxide layers of tubular or planar fuel cladding materials. The detectability of hydrogen concentration in the cladding wall is also discussed.
    Original languageEnglish
    Title of host publicationBaltica VIII
    Subtitle of host publicationLife Management and Maintenance for Power Plants
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages294-308
    Volume2
    ISBN (Electronic)978-951-38-7594-7
    ISBN (Print)978-951-38-7593-2
    Publication statusPublished - 2010
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventBALTICA VIII - International Conference on Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
    Duration: 18 May 201020 May 2010

    Publication series

    NameVTT Symposium
    PublisherVTT
    Number265
    ISSN (Print)0357–9387
    ISSN (Electronic)1455–0873

    Conference

    ConferenceBALTICA VIII - International Conference on Life Management and Maintenance for Power Plants
    CountryFinland
    CityHelsinki-Stockholm
    Period18/05/1020/05/10

    Fingerprint

    Hydrogen
    Thickness measurement
    Oxides
    Light water reactors
    Eddy currents
    Delamination
    Radioisotopes
    Creep
    Ultrasonics
    Corrosion
    Heat transfer
    Cracks
    Degradation
    Networks (circuits)
    Lasers
    Water

    Cite this

    Jäppinen, T., & Sandlin, S. (2010). Development of nondestructive techniques for fuel cladding evaluation in hot cell. In Baltica VIII: Life Management and Maintenance for Power Plants (Vol. 2, pp. 294-308). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 265
    Jäppinen, Tarja ; Sandlin, Stefan. / Development of nondestructive techniques for fuel cladding evaluation in hot cell. Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2010. pp. 294-308 (VTT Symposium; No. 265).
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    title = "Development of nondestructive techniques for fuel cladding evaluation in hot cell",
    abstract = "In nuclear light water reactors (LWR), an effective heat transfer from the fuel through the fuel cladding to the water in the reactor is essential. Furthermore, the cladding should prevent the radionuclides in the fuel from contaminating the reactor circuit. During service the cladding suffers from damage by corrosion, microstructural changes, hydrogen pick-up, creep etc. Regular nondestructive evaluation in a hot cell is a relatively new complement to laborious destructive evaluation of in-service degradation of irradiated material. In this work the possibilities of laser ultrasonics and eddy current techniques in hot cells are presented. The main emphasis is on oxide thickness measurements and on detection of cracks and delaminations for oxide layers of tubular or planar fuel cladding materials. The detectability of hydrogen concentration in the cladding wall is also discussed.",
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    Jäppinen, T & Sandlin, S 2010, Development of nondestructive techniques for fuel cladding evaluation in hot cell. in Baltica VIII: Life Management and Maintenance for Power Plants. vol. 2, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 265, pp. 294-308, BALTICA VIII - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 18/05/10.

    Development of nondestructive techniques for fuel cladding evaluation in hot cell. / Jäppinen, Tarja; Sandlin, Stefan.

    Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2010. p. 294-308 (VTT Symposium; No. 265).

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

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    AU - Jäppinen, Tarja

    AU - Sandlin, Stefan

    PY - 2010

    Y1 - 2010

    N2 - In nuclear light water reactors (LWR), an effective heat transfer from the fuel through the fuel cladding to the water in the reactor is essential. Furthermore, the cladding should prevent the radionuclides in the fuel from contaminating the reactor circuit. During service the cladding suffers from damage by corrosion, microstructural changes, hydrogen pick-up, creep etc. Regular nondestructive evaluation in a hot cell is a relatively new complement to laborious destructive evaluation of in-service degradation of irradiated material. In this work the possibilities of laser ultrasonics and eddy current techniques in hot cells are presented. The main emphasis is on oxide thickness measurements and on detection of cracks and delaminations for oxide layers of tubular or planar fuel cladding materials. The detectability of hydrogen concentration in the cladding wall is also discussed.

    AB - In nuclear light water reactors (LWR), an effective heat transfer from the fuel through the fuel cladding to the water in the reactor is essential. Furthermore, the cladding should prevent the radionuclides in the fuel from contaminating the reactor circuit. During service the cladding suffers from damage by corrosion, microstructural changes, hydrogen pick-up, creep etc. Regular nondestructive evaluation in a hot cell is a relatively new complement to laborious destructive evaluation of in-service degradation of irradiated material. In this work the possibilities of laser ultrasonics and eddy current techniques in hot cells are presented. The main emphasis is on oxide thickness measurements and on detection of cracks and delaminations for oxide layers of tubular or planar fuel cladding materials. The detectability of hydrogen concentration in the cladding wall is also discussed.

    M3 - Conference article in proceedings

    SN - 978-951-38-7593-2

    VL - 2

    T3 - VTT Symposium

    SP - 294

    EP - 308

    BT - Baltica VIII

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Jäppinen T, Sandlin S. Development of nondestructive techniques for fuel cladding evaluation in hot cell. In Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2. Espoo: VTT Technical Research Centre of Finland. 2010. p. 294-308. (VTT Symposium; No. 265).