Hydrazine Usage for Corrosion Control in PWR Plants with Powdered-Resin-Condensate Polishers. Final Report

摘要

The objective of this project was to obtain the data necessary to determine the optimum injection point and amount of hydrazine to be used for oxygen control in PWR units with condensate polishing demineralizers. An additional objective was to demonstrate that the condensate polisher can be used as a means to reduce the oxygen concentration in the condensate when a sufficient excess concentration of hydrazine (over the oxygen) concentration is carried over with the main steam into the condensers. Testing was performed at North Anna Unit 2 which employs powdered resin-type condensate polishing equipment. Testing was also scheduled to be performed at Ginna and Sequoyah Unit 1 plants; however, because of an unscheduled shutdown at Ginna and inability to control hydrazine dosage at Sequoyah, these tests were not performed. (ERA citation 08:031643)