Effect of Neutron Irradiation on Brittle Fracture Initiation in VVER-1000 Reactor Pressure Vessel Materials

    (Received 18 October 2013; accepted 3 January 2014)

    Published Online: 2014

    CODEN: MPCOAD

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    Abstract

    This work contains fractographic analysis of base metal and weld metal specimens of a VVER-1000 reactor pressure vessel (RPV) in initial state and after neutron irradiation. In this work, two main types of brittle fracture origins were discovered for VVER-1000 RPV materials in different states—non-metallic inclusions and grain or subgrain boundaries, as well as the correlation between the cleavage initiation distance and critical stress-intensity factor KJc values for each type of fracture origin. In this paper, evolution of relative proportion between these two types of origins under neutron irradiation was also studied.


    Author Information:

    Kuleshova, E. A.
    National Research Centre, Kurchatov Institute, Moscow,

    Artamonov, M. A.
    National Research Centre, Kurchatov Institute, Moscow,

    Erak, A. D.
    National Research Centre, Kurchatov Institute, Moscow,


    Stock #: MPC20130078

    ISSN: 2165-3992

    DOI: 10.1520/MPC20130078

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    Author
    Title Effect of Neutron Irradiation on Brittle Fracture Initiation in VVER-1000 Reactor Pressure Vessel Materials
    Symposium , 0000-00-00
    Committee E08