Effect of Moisture-Separator-Drain Routing on OTSG Secondary-System Chemistry

摘要

Impurity concentration data (corrosion, products, ionic, silica, and volatile species) for the secondary systems of four pressurized water reactor (PWR) power plants with once-through steam generators (OTSG) were obtained employing integrated sampling techniques and by a review of plant operating data. Based on these data, mass transport relations were developed to determine the effect of moisture separator drain (MSD) routing on final feedwater chemistry, and, hence, impurity transport to the OTSG. (ERA citation 07:061316)