Volume 9, Issue 3 (March 2012)

    Neutron and Gamma Field Investigations in the VVER-1000 Mock-Up Concrete Shielding on the Reactor LR-0

    (Received 17 May 2011; accepted 21 November 2011)

    Published Online: 2012

    CODEN: JAIOAD

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    Abstract

    Two sets of neutron and gamma field investigations were carried out in the dismountable model of radiation shielding of the VVER-1000 mock-up on the LR-0 reactor. First, measurements and calculations of the 3He(n,p)T reaction rate and fast neutrons and gamma flux spectra in the operational neutron monitor channel inside a concrete shielding for different shapes and locations of the channel (cylindrical channel in a concrete, channels with collimator in a concrete, cylindrical channel in a graphite). In all cases measurements and calculations of the 3He(n,p)T reaction rate were done with and without an additional moderator-polyethylene insert inside the channel. Second, measurements and calculations of the 3He(n,p)T reaction rate spatial distribution inside a concrete. The 3He(n,p)T reaction rate measurements and calculations were carried out exploring the relative thermal neutron density in the channels and its space distribution in the concrete. Fast neutrons and gamma measurements were carried out with a stilbene (45 × 45 mm) scintillation spectrometer in the energy regions 0.5–10 MeV (neutrons) and 0.2–10 MeV (gammas).


    Author Information:

    Zaritsky, S.
    National Research Center, Kurchatov Institute, Moscow

    Egorov, A.
    National Research Center, Kurchatov Institute, Moscow

    Ošmera, B.
    Research Centre Řež Ltd, Řež,

    Mařik, M.
    Research Centre Řež Ltd, Řež,

    Rypar, V.
    Research Centre Řež Ltd, Řež,

    Cvachovec, F.
    Univ. of Defense, Brno,

    Kolros, A.
    Czech Technical Univ., Prague,


    Stock #: JAI103995

    ISSN: 1546-962X

    DOI: 10.1520/JAI103995

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    Author
    Title Neutron and Gamma Field Investigations in the VVER-1000 Mock-Up Concrete Shielding on the Reactor LR-0
    Symposium , 0000-00-00
    Committee E10