Development of neutron and X-ray imaging techniques for nuclear fuel bundle optimization

Robert Zboray, Christian Bolesch, Horst Michael Prasser

    Research output: Contribution to journalArticle

    Abstract

    High-quality boiling crisis, i.e. dry out of the liquid film is an important operational safety issue for boiling water reactors. The phenomena involved in dry out are complicated and difficult to capture in full details in experiments. We follow a step-wise approach to the problem and utilize innovative, high-resolution measurement techniques. First extensive testing have been carried out on partial nuclear fuel bundle models containing typically a couple of neighboring subchannels. These first series featured adiabatic, air-water annular flows with and without the presence of prototypical functional spacers. Cold neutron imaging has been used to map the distribution of the liquid film thickness on the virtual fuel rods and on the spacer structures. As a next step a dedicated loop using a special working fluid has been designed enabling examining convective boiling two-phase flow in similar geometries as the adiabatic tests. Cold neutron and X-ray imaging can be used for the heated set-up to try to capture actual dry out phenomena. An overview of the result of the adiabatic test series and the first result with the heated experiments are given below.

    Original languageEnglish (US)
    Pages (from-to)24-33
    Number of pages10
    JournalNuclear Engineering and Design
    Volume336
    DOIs
    StatePublished - Sep 1 2018

    Fingerprint

    nuclear fuels
    Liquid films
    Nuclear fuels
    imaging techniques
    Boiling liquids
    bundles
    Neutrons
    cold neutrons
    Imaging techniques
    neutrons
    X rays
    boiling
    spacers
    liquid
    optimization
    Boiling water reactors
    two phase flow
    Two phase flow
    boiling water reactors
    annular flow

    All Science Journal Classification (ASJC) codes

    • Nuclear and High Energy Physics
    • Nuclear Energy and Engineering
    • Materials Science(all)
    • Safety, Risk, Reliability and Quality
    • Waste Management and Disposal
    • Mechanical Engineering

    Cite this

    Zboray, Robert ; Bolesch, Christian ; Prasser, Horst Michael. / Development of neutron and X-ray imaging techniques for nuclear fuel bundle optimization. In: Nuclear Engineering and Design. 2018 ; Vol. 336. pp. 24-33.
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    Development of neutron and X-ray imaging techniques for nuclear fuel bundle optimization. / Zboray, Robert; Bolesch, Christian; Prasser, Horst Michael.

    In: Nuclear Engineering and Design, Vol. 336, 01.09.2018, p. 24-33.

    Research output: Contribution to journalArticle

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