STP1228

    Two-Dimensional Neutron and Gamma Calculations for Devices Irradiated in BR2 Reflector Positions

    Published: Jan 1994


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    Abstract

    For two typical LWR fuel rod irradiation devices introduced into the BR2 reflector two-dimensional neutron and gamma calculations are being carried out.

    In the first case a single fuel rod surrounded by several pressure tubes and by a time-variable neutron screen (He−3 gas at various pressures) is studied. The calculations are carried out in R,θ geometry, centered on the irradiated fuel rod.

    In the second case a bundle of nine fuel rods in a 3×3 square lattice is irradiated. Here the calculations are performed in X,Y geometry.

    The necessity is discussed of performing two-dimensional calculations for these irradiations in the BR2 reflector, to improve the modelling of the fuel behaviour.

    Keywords:

    fissile structural materials irradiations, MTRs, reflector irradiations, geometrical modelling, two-dimensional calculations, fuel rod power


    Author Information:

    De Raedt, CM
    SCK/CEN, MOL,

    Bodart, SF
    SCK/CEN, MOL,

    Ponsard, BJ
    SCK/CEN, MOL,

    Wéber, MJ
    SCK/CEN, MOL,

    Maldague, T
    BELGONUCLEAIRE, Brussels,


    Paper ID: STP15156S

    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP15156S


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