Fracture mechanics characterisation of the beltline welding seam of the decommissioned WWER-440 reactor pressure vessel of nuclear power plant Greifswald Unit 4
| Autor: | Hans-Werner Viehrig, Matti Valo, M. Houska, Eberhard Altstadt |
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| Rok vydání: | 2012 |
| Předmět: |
Thermal shock
Materials science master curve 020209 energy Charpy impact test 02 engineering and technology Welding fracture toughness specimen orientation law.invention integrity assessment Fracture toughness 0203 mechanical engineering law 0202 electrical engineering electronic engineering information engineering General Materials Science Neutron Reactor pressure vessel Decommissioned reactor pressure vessel weld metal Mechanical Engineering Metallurgy Fracture mechanics Microstructure 020303 mechanical engineering & transports 13. Climate action Mechanics of Materials |
| Zdroj: | Viehrig, H-W, Altstadt, E, Houska, M & Valo, M 2012, ' Fracture mechanics characterisation of the beltline welding seam of the decommissioned WWER-440 reactor pressure vessel of nuclear power plant Greifswald Unit 4 ', International Journal of Pressure Vessels and Piping, vol. 89, pp. 129-136 . https://doi.org/10.1016/j.ijpvp.2011.10.016 International Journal of Pressure Vessels and Piping 89(2012), 129-136 |
| ISSN: | 0308-0161 |
| DOI: | 10.1016/j.ijpvp.2011.10.016 |
| Popis: | 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. Generally, the ductile-to-brittle transition temperature shift predicted by the Russian code for the present content of deleterious elements P and Cu and the accumulated neutron fluences lies within the amount of the scatter of the measured T0 values. Metallographic investigations show that the T0 values measured with T–S oriented Charpy size SE(B) specimens from different thickness locations of the multilayer welding seams strongly depend on the microstructure at the specimen crack tip, and, consequently, on the initial structure of the multilayer welding seam. The RPV integrity is discussed, taking into account a pressurised thermal shock scenario. |
| Databáze: | OpenAIRE |
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