Davis-Besse Nuclear Station has several years' experience in utilizing a PC-based on-line chemistry monitoring system for monitoring and subsequently controlling their steam plant chemistry. This paper presents information on methods and equipment used by Toledo Edison Company (TED) to monitor steam plant water chemistry and to discuss some of the advantages of such systems, based on their experiences (i.e., advantages realized from using an on-line [IBM-PC] chemistry data management system for reviewing and evaluating secondary-plant chemistry and making timely chemistry adjustments). Included in the discussion will be station chemistry program enhancements that can be directly related to the on-line chemistry data management system.

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