One of the major problems encountered in operating pressurized water reactor (PWR) steam generators is the accumulation of metal oxide deposits on the secondary side. A new method of controlling iron deposition in a PWR steam generator has been developed. This method consists of continuously feeding a high purity polymeric dispersant to keep the corrosion products entering the steam generator in suspension until they can be filtered from the blowdown. The paper describes the
criteria for designing a polymer along with the steps necessary to qualify the selected material for evaluation in an operating PWR. This includes a detailed discussion of polymer characteristics, performance requirements, materials compatibility and potential implications for plant operation.