Residual Stress Measurement and the Effect of Heat Treatment in Cladded Control Rod Drive Specimens
| Autor: | Jinya Katsuyama, Ed Kingston, Makoto Udagawa, Kunio Onizawa, Ashley Bowman |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Proceedings of the 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems — Water Reactors ISBN: 9783319487601 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors |
| DOI: | 10.1002/9781118456835.ch231 |
| Popis: | This paper presents results of residual stress measurements and modelling within the cladding and J-groove weld of Control Rod Drive (CRD) specimens in the as-welded and Post Weld Heat Treated (PWHT) states. Knowledge of the residual stresses present in CRD nozzles is critical when modelling the fracture mechanics of failures of nuclear power plant components to dictate inspections intervals and optimise plant downtime. The specimens comprised of ferritic steel blocks with 309L stainless steel cladding and a single J-groove weld attaching the 304 stainless steel nozzles. Multiple measurements were made through the thickness of the specimens in order to give biaxial residual stress profiles through all the different fusion boundaries. The results show the effect of PWHT in reducing residual stresses both in the weld and ferritic material. The beneficial use of measurements is highlighted to provide confidence in the modelled results and prevent over conservatism in integrity calculations, costing unnecessary time and money. |
| Databáze: | OpenAIRE |
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