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Two-stage modelling of hexagonal fuel assemblies vibration considering mechanical nonlinearities

Result description

The paper presents a complex modelling concept for the nuclear fuel assembly vibration caused by the coolant pressure pulsations generated by the main circulation pumps. The method is based on the two-stage modelling with the reactor's global model at the first stage and the detailed model of the particular fuel assembly at the second stage. This approach allows respecting all the relevant mechanical nonlinearities - clearances and friction in the key-groove couplings between the reactor core barrel and the pressure vessel and the internal impact or the friction interaction of the fuel assemblies. Numerical simulations allow better interpretation of monitoring data concerning the fuel burn-up.

Keywords

Friction vibrationCoolant pressure pulsationsNonlinear vibrationFuel assemblyNuclear reactor

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    Two-stage modelling of hexagonal fuel assemblies vibration considering mechanical nonlinearities

  • Original language description

    The paper presents a complex modelling concept for the nuclear fuel assembly vibration caused by the coolant pressure pulsations generated by the main circulation pumps. The method is based on the two-stage modelling with the reactor's global model at the first stage and the detailed model of the particular fuel assembly at the second stage. This approach allows respecting all the relevant mechanical nonlinearities - clearances and friction in the key-groove couplings between the reactor core barrel and the pressure vessel and the internal impact or the friction interaction of the fuel assemblies. Numerical simulations allow better interpretation of monitoring data concerning the fuel burn-up.

  • Czech name

  • Czech description

Classification

  • Type

    Jimp - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20302 - Applied mechanics

Result continuities

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    PROGRESS IN NUCLEAR ENERGY

  • ISSN

    0149-1970

  • e-ISSN

  • Volume of the periodical

    138

  • Issue of the periodical within the volume

    AUG 2021

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    12

  • Pages from-to

    1-12

  • UT code for WoS article

    000668949900003

  • EID of the result in the Scopus database

    2-s2.0-85108059212

Basic information

Result type

Jimp - Article in a specialist periodical, which is included in the Web of Science database

Jimp

OECD FORD

Applied mechanics

Year of implementation

2021