• About
    • Login
    View Item 
    •   Institutional Repository Home
    • Electronic Theses and Dissertations
    • Electronic Theses and Dissertations
    • View Item
    •   Institutional Repository Home
    • Electronic Theses and Dissertations
    • Electronic Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Institutional RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsDepartmentThis CollectionBy Issue DateAuthorsTitlesSubjectsDepartment

    My Account

    LoginRegister

    Vibroacoustic methods for corrosion-state monitoring in nuclear power plant secondary piping structures

    Stilson, Thomas Allen
    : https://etd.library.vanderbilt.edu/etd-08142019-163811
    http://hdl.handle.net/1803/13903
    : 2019-08-15

    Abstract

    Pipe wall corrosion in nuclear power plants has been identified as a critical cause of plant degradation. The application of risk-informed in-service inspection techniques has significantly improved the relative core damage frequency and the average capacity factor of the industry fleet, but the majority of inspection practices remain manual and point-wise in nature. Because nuclear power plant outages can cost as much as $2 million per day, time spent on inspection is expensive. Health-monitoring techniques using vibroacoustic sensor networks were investigated with the goal of developing an automatable and scalable degradation-state monitoring solution to reduce the amount of time spent during outages. Transmissibility function estimation between degrees of freedom was shown to have potential to detect mass change in pipe elbow fittings, and a damage index was developed to quantify the degree of damage based on this estimation. This index was shown to trend robustly between pipe elbows and remain stable over an 8-day operating period. Temperature, pressure, and gasket material were characterized for their impact on the damage index. Recently developed smart film technology was also evaluated for its ability to modulate the film’s complex shear modulus in correspondence to the level of chelation, or iron ion absorption, experienced by the film. In preliminary experimental characterization, this film was shown to have potential to indicate early-stage onset of corrosion with frequency response function estimation. Improving sensitivity to modulating film properties was identified as a major next step for development of the smart film approach to corrosion-onset detection.
    Show full item record

    Files in this item

    Icon
    Name:
    Thomas_Stilson_MS_Thesis_081419.pdf
    Size:
    4.667Mb
    Format:
    PDF
    View/Open

    This item appears in the following collection(s):

    • Electronic Theses and Dissertations

    Connect with Vanderbilt Libraries

    Your Vanderbilt

    • Alumni
    • Current Students
    • Faculty & Staff
    • International Students
    • Media
    • Parents & Family
    • Prospective Students
    • Researchers
    • Sports Fans
    • Visitors & Neighbors

    Support the Jean and Alexander Heard Libraries

    Support the Library...Give Now

    Gifts to the Libraries support the learning and research needs of the entire Vanderbilt community. Learn more about giving to the Libraries.

    Become a Friend of the Libraries

    Quick Links

    • Hours
    • About
    • Employment
    • Staff Directory
    • Accessibility Services
    • Contact
    • Vanderbilt Home
    • Privacy Policy