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Client
Confidential
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Business need
Assess the integrity of high temperature components
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Why Frazer-Nash?
Frazer-Nash has an extensive expertise in thermal analysis using Computational Fluid Dynamics
The challenge
The feedwater nozzles inside most conventional and nuclear power station boilers exist within an environment of continuous high-pressure, and extreme temperature variations that can significantly reduce the fatigue life of even the most robust components (see Fig. 1).
Throughout their operational life, they endure a range of transient loads, often passing beyond those encountered in normal continuous operation, whilst thermal stresses placed on the nozzle (caused by passing cool feedwater into a hot environment) gradually reduce the life of critical welds through fatigue.
A previous study had predicted that the life of most feedwater nozzles was significantly less than the rest of the plant. Frazer-Nash was therefore asked to conduct a more indepth fatigue life prediction study for one such set of nozzles.
