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    Seismic Damping Factors of Small Bore Piping as Influenced by Insulation and Support Elements

    Source: Journal of Pressure Vessel Technology:;1985:;volume( 107 ):;issue: 002::page 142
    Author:
    L. K. Severud
    ,
    M. J. Anderson
    ,
    D. A. Barta
    DOI: 10.1115/1.3264426
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Seismic damping tests of a prototypical Liquid Metal Fast Breeder Reactor (LMFBR) small bore piping system is described, and measured transient responses to pulse excitations are reported. The test specimen was representative of a typical LMFBR insulated small bore piping system, and it was supported from a rigid test frame by prototypic dead weight supports, mechanical snubbers, and pipe clamps. Various support configurations were tested to assess the response sensitivity to insulation and other nonlinear support characteristics. Damping factors increased significantly due to the insulation and use of mechanical snubbers. Factors much higher than the magnitudes currently allowed in design by the USNRC Regulatory Guide 1.61, were found. This verified the design values, and it also pointed out the possibility of undue conservatism and costly overdesign resulting from use of the present design values.
    keyword(s): Damping , Pipes , Insulation , Liquid metal fast breeder reactors , Design , Piping systems , Weight (Mass) , Structural frames AND Transients (Dynamics) ,
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      Seismic Damping Factors of Small Bore Piping as Influenced by Insulation and Support Elements

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/100289
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    • Journal of Pressure Vessel Technology

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    contributor authorL. K. Severud
    contributor authorM. J. Anderson
    contributor authorD. A. Barta
    date accessioned2017-05-08T23:21:00Z
    date available2017-05-08T23:21:00Z
    date copyrightMay, 1985
    date issued1985
    identifier issn0094-9930
    identifier otherJPVTAS-28256#142_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/100289
    description abstractSeismic damping tests of a prototypical Liquid Metal Fast Breeder Reactor (LMFBR) small bore piping system is described, and measured transient responses to pulse excitations are reported. The test specimen was representative of a typical LMFBR insulated small bore piping system, and it was supported from a rigid test frame by prototypic dead weight supports, mechanical snubbers, and pipe clamps. Various support configurations were tested to assess the response sensitivity to insulation and other nonlinear support characteristics. Damping factors increased significantly due to the insulation and use of mechanical snubbers. Factors much higher than the magnitudes currently allowed in design by the USNRC Regulatory Guide 1.61, were found. This verified the design values, and it also pointed out the possibility of undue conservatism and costly overdesign resulting from use of the present design values.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleSeismic Damping Factors of Small Bore Piping as Influenced by Insulation and Support Elements
    typeJournal Paper
    journal volume107
    journal issue2
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.3264426
    journal fristpage142
    journal lastpage147
    identifier eissn1528-8978
    keywordsDamping
    keywordsPipes
    keywordsInsulation
    keywordsLiquid metal fast breeder reactors
    keywordsDesign
    keywordsPiping systems
    keywordsWeight (Mass)
    keywordsStructural frames AND Transients (Dynamics)
    treeJournal of Pressure Vessel Technology:;1985:;volume( 107 ):;issue: 002
    contenttypeFulltext
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