ADJUSTABLE SPEED DRIVES IMPROVE CIRCULATING WATER-SYSTEM

This paper illustrates the integration of electrical and mechanical en gineering requirements to produce a solution to past problems and futu re operating demands. The application of adjustable speed drives in th e modifications of the circulating water system at Indian Point No. 3 Nuclear Power Plant provided increased operating flexibility, efficien cy and avoided otherwise costly renovations to the plant electrical sy stem. Rectification of the original inadequate design of the circulati ng water system, in addition to maximizing plant efficiency consistent with environmental considerations, formed the basis for this modifica tion. This entailed replacement of all six circulating water pumps and motors and physical modifications to the intake system. This paper de tails the methodology used in this engineering task. The new system wa s installed successfully and has been operating reliably and economica lly for the past eight years.