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    Small Specimen Testing Applied at Surveillance Extension

    Published: 01 January 1998

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    The WWER-440 V-213 type RPVs are equipped with the surveillance specimens used to predict the embrittlement of the RPV material. These specimens are located near the core, resulting in accelerated irradiation. After four years of operation only one overexposed set remains in each unit. To obtain a more extensive database for life time calculation and life time management, a new, more extended surveillance program has been elaborated and implemented. Due to the limited availability of archive materials reconstructed Charpy V specimens and small size smooth and notched tensile bars were used in the program. To develop this surveillance extension, an extensive laboratory study on use of reconstructed Charpy and subsize tensile specimens was performed. Methods for K1a measurements on small size specimens were also studied.


    Small specimen, reconstituted specimens, surveillance testing, crack arrest, fracture toughness, electron beam welding

    Author Information:

    Czoboly, E
    Senior Researcher, Atomic Energy Research Institute,

    Gillemot, F
    Senior Researcher, Atomic Energy Research Institute,

    Oszwald, F
    Head of Testing Lab. Nuclear Power Plant Paks, Paks,

    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP37990S