Large scale gas mixing and stratification triggered by a buoyant plume with and without occurrence of condensation

Domenico Paladino, Olivier Auban, Robert Zboray

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Scopus citations

    Abstract

    The benefits of using codes with 3-D capabilities to address safety issues of LWRs will be applicable to both the current generation of nuclear reactors as well to future ALWRs. The phenomena governing the containment response in case of some postulated severe accident scenarios include gas (air, hydrogen, steam) stratification in the containment, gas distribution between containment compartments, wall condensation, etc. These phenomena are driven by buoyant high momentum injection (jets) and/or low momentum injection (plumes). For instance, mixing in the immediate vicinity of the postulated line break is mainly dominated by very high velocity efflux, while low-momentum flows are responsible for most of the transport processes within the containment. A project named SETH is currently in progress under the auspices of 15 OECD countries, with the aim of creating an experimental database suitable to assess the 3-D code capabilities in analyzing key-physical phenomena relevant for LWR safety analysis. This paper describes some results of two SETH tests, performed in the PANDA facility (located at PSI in Switzerland), focusing on plumes flowing near a containment wall. The plumes are generated by injecting a constant amount of steam in one of two interconnected vessels initially filled with air. In one of the two tests the temperature of the injected steam and the initial containment wall and fluid temperatures allowed for condensation during the test.

    Original languageEnglish (US)
    Title of host publicationProceedings of the 2006 International Congress on Advances in Nuclear Power Plants, ICAPP'06
    Pages1801-1808
    Number of pages8
    StatePublished - Dec 1 2006
    EventAmerican Nuclear Society Embedded Topical Meeting - 2006 International Congress on Advances in Nuclear Power Plants, ICAPP'06 - Reno, NV, United States
    Duration: Jun 4 2006Jun 8 2006

    Publication series

    NameProceedings of the 2006 International Congress on Advances in Nuclear Power Plants, ICAPP'06
    Volume2006

    Other

    OtherAmerican Nuclear Society Embedded Topical Meeting - 2006 International Congress on Advances in Nuclear Power Plants, ICAPP'06
    CountryUnited States
    CityReno, NV
    Period6/4/066/8/06

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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  • Cite this

    Paladino, D., Auban, O., & Zboray, R. (2006). Large scale gas mixing and stratification triggered by a buoyant plume with and without occurrence of condensation. In Proceedings of the 2006 International Congress on Advances in Nuclear Power Plants, ICAPP'06 (pp. 1801-1808). (Proceedings of the 2006 International Congress on Advances in Nuclear Power Plants, ICAPP'06; Vol. 2006).