Adjustable speed drives improve circulating water system

This paper illustrates the integration of electrical and mechanical engineering requirements to produce a solution to past problems and future operating demands. The application of adjustable speed drives in the modifications or the circulating water system at Indian Point No. 3 nuclear power plant provided increased operating flexibility, efficiency and avoided otherwise costly renovations to the plant electrical system. Rectification or the original inadequate design of the circulating water system, in addition to maximizing plant efficiency consistent with environmental considerations, formed the basis for this modification. This entailed replacement of all six circulating water pumps and motors and physical modifications to the intake system. This paper details the methodology used in this engineering task. The new system was installed successfully and has been operating reliably and economically for the past eight gears