Final Results of an Analytical Round Robin Exercise to Support Constraint Effects

Marc Scibetta, Eberhard Altstadt, , Enrico Lucon

    Research outputpeer-review


    There is strong interest from the nuclear industry to use the precracked Charpy single-edge notched bend, SE(B), specimen (PCVN) to enable determination of the reference temperature, T0, with reactor pressure vessel surveillance specimens. Unfortunately, for many different ferritic steels, tests with the PCVN specimen (10x10x55 mm) have resulted in T0 temperatures up to 25°C lower than T0 values obtained using data from compact, C(T), specimens. This difference in T0 reference temperature has often been designated a specimen bias effect, and the primary focus for explaining this effect is loss of constraint in the PCVN specimen. The International Atomic Energy Agency has developed a three-part coordinated research project (CRP) to evaluate various issues associated with the fracture toughness Master Curve for application to light-water reactor pressure vessels. One part of the CRP is focused on the issue of test specimen geometry effects, with emphasis on the PCVN bias. This topic area was organized in two parts, an experimental part and an analytical part with a view towards each part complementing the other.
    Original languageEnglish
    Title of host publicationProceedings of the ASME 2009 Pressure Vessels and Piping Division Conference
    Place of PublicationNew York, NY, United States
    StatePublished - Jul 2009
    Event2009 - ASME - Pressure Vessels and Piping Conference - ASME, Prague
    Duration: 17 Jul 200917 Jul 2009


    Conference2009 - ASME - Pressure Vessels and Piping Conference
    Country/TerritoryCzech Republic

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