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    STP1011

    Positron Lifetime Characterization of Irradiated Pressure Vessel Model Alloys

    Published: 0


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    Abstract

    We have measured positron lifetimes in pressure vessel steel model alloys of A533-B and A302-B type, containing various amounts of Cu, Mn, Mo, and Ni alloying elements. Samples were prepared from broken halves of irradiated Charpy specimens used earlier for radiation sensitivity and composition interaction studies. The observed changes in the average positron lifetime seem to correlate well with changes in the alloy composition. A preliminary interpretation of the lifetime values is given.

    Keywords:

    pressure vessel steel, radiation embrittlement, positron lifetime


    Author Information:

    Valo, M
    Senior research associate, Reactor Laboratory, Technical Research Center of Finland (VTT), Espoo,

    Huomo, H
    Research associate, research assistant, and professor, Laboratory of Physics, Helsinki University of Technology, Espoo,

    Nyberg, P
    Research associate, research assistant, and professor, Laboratory of Physics, Helsinki University of Technology, Espoo,

    Hautojarvi, P
    Research associate, research assistant, and professor, Laboratory of Physics, Helsinki University of Technology, Espoo,


    Committee/Subcommittee: E10.05

    DOI: 10.1520/STP10400S