Publication year: 2011 Source: International Journal of Pressure Vessels and Piping, Available online 20 October 2011 Hans-Werner Viehrig, Eberhard Altstadt, Mario Houska, Matti Valo The paper presents data measured for trepans sampled from the decommissioned WWER-440 reactor pressure vessel of the NPP Greifswald Unit 4. The main focus of this work is on fracture toughness characterisation according to test standard ASTM E1921. Large variations in the evaluated reference temperature values, T0, across the wall of the multilayer beltline welding seam were observed.
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Fracture mechanics characterisation of the beltline welding seam of the decommissioned WWER-440 reactor pressure vessels of nuclear power plant…