Assess the integrity of high temperature components
Frazer-Nash has an extensive expertise in thermal analysis using Computational Fluid Dynamics
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.