Non-condensable gas plugging and mixing behavior in PWR steam generator tubes during reflux condensation

Filip Janasz, Horst Michael Prasser, Detlef Suckow, Marton Szogradi

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    In this paper we investigated reflux condensation in a single pressurized water reactor steam generator tube in the presence of non-condensable gases. We observed the gas plug formation, behavior and impact on heat removal under thermo-hydraulic conditions typical for the LOCA stage during which the reflux condenser regime is characteristic. We used nitrogen and helium to observe differences of the plug behavior for heavy and light gases. Measurements reveal that the non-condensable gas type plays a crucial role in the plug formation. Light gas (He) forms sharp and narrow interface and limits condensation efficiently while heavy gas (N2) develops wide, diffuse interface with gradual temperature drop.

    Original languageEnglish
    Title of host publication26th International Conference on Nuclear Engineering
    Subtitle of host publicationThermal-Hydraulics and Safety Analyses
    PublisherAmerican Society of Mechanical Engineers ASME
    Number of pages10
    Volume6B
    ISBN (Print)978-0-7918-5149-4
    DOIs
    Publication statusPublished - Nov 2018
    MoE publication typeNot Eligible
    Event26th International Conference on Nuclear Engineering, ICONE 2018 - London, United Kingdom
    Duration: 22 Jul 201826 Jul 2018
    Conference number: 26

    Conference

    Conference26th International Conference on Nuclear Engineering, ICONE 2018
    Abbreviated titleICONE 2018
    CountryUnited Kingdom
    CityLondon
    Period22/07/1826/07/18

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    Janasz, F., Prasser, H. M., Suckow, D., & Szogradi, M. (2018). Non-condensable gas plugging and mixing behavior in PWR steam generator tubes during reflux condensation. In 26th International Conference on Nuclear Engineering: Thermal-Hydraulics and Safety Analyses (Vol. 6B). [ICONE26-82350] American Society of Mechanical Engineers ASME. https://doi.org/10.1115/ICONE26-82350