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    STP1608

    Advanced Neutron Dosimetry on VVER-440 Aimed to Reactor Equipment Load Evaluation during Lifetime Prolongation

    Published: 2018


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    Abstract

    The lifetime of nonrestorable reactor equipment (e.g., reactor pressure vessels, in- and ex-vessel constructions, reactor support structures) of a first-generation water-water energetic reactor, VVER-440, may restrict plant life as a whole. Service life extension has affected the first generation of VVER-440 type reactors. Today, all Russian first-generation VVER-440s that have been in operation more than 45 years run with reduced cores by using dummy assemblies, except reactor Unit 4 of the Novovoronezh nuclear power plant. In comparison with other power units, the full-core loading scheme of this unit results in the highest neutron fluence accumulated over the whole operation period. Another important aspect of dosimetry research on Unit 4 of the Novovoronezh nuclear power plant reactor is the verification and validation of calculational methods used for the prediction of the maximum neutron fluence on the VVER-440 pressure vessel.

    Keywords:

    VVER, lifetime prolongation, radiation loading parameters, measurements, conservative approach


    Author Information:

    Borodkin, Pavel
    Scientific and Engineering Centre for Nuclear and Radiation Safety, Moscow,

    Gazetdinov, Azamat
    Scientific and Engineering Centre for Nuclear and Radiation Safety, Moscow,

    Khrennikov, Nikolay
    Scientific and Engineering Centre for Nuclear and Radiation Safety, Moscow,

    Konheiser, Jörg
    Helmholtz Zentrum Dresden-Rossendorf e.V. (HZDR), DresdenDresden,

    Dzhalandinov, Alexander
    OKB “Gidropress,”, Podolsk,

    Sidorov, Alexander
    OKB “Gidropress,”, Podolsk,

    Aleshin, Sergey
    National Research Centre, Kurchatov Institute (NRC KI), Moscow,

    Zaritskiy, Sergey M.
    National Research Centre, Kurchatov Institute (NRC KI), Moscow,

    Egorov, Alexander L.
    National Research Centre, Kurchatov Institute (NRC KI), Moscow,

    Kochkin, Vyacheslav N.
    National Research Centre, Kurchatov Institute (NRC KI), Moscow,

    Erak, Dmitry Yu.
    National Research Centre, Kurchatov Institute (NRC KI), Moscow,

    Panferov, Pavel
    National Research Centre, Kurchatov Institute (NRC KI), Moscow,

    Makhotin, Denis
    National Research Centre, Kurchatov Institute (NRC KI), Moscow,


    Committee/Subcommittee: E10.05

    DOI: 10.1520/STP160820170118