AU175: Determination of Organic Acids and Inorganic Anions in Lithium-Containing Boric Acid-Treated Nuclear Power Plant Waters

Instrument Type: IC

In nuclear power plants with pressurized water reactors the primary coolant includes boric acid, which at high temperature and pressure can form crud. Lithium hydroxide is added to prevent this. Trace anionic impurities can serve as catalysts for corrosion. The experimental approach shown in this work combines the direct injection, electrolytically generated tetraborate eluent approach to analyze lithium-containing borated waters for fluoride, formate, chloride, and sulfate with the addition of a continuously regenerated cation trap column to remove lithium and other cations from the sample.

AN185: Determination of Trace Organic Acids and Inorganic Anions in Boric Acid-Treated Power Plant Waters Using an Automated Reagent-Free Ion Chromatography System

Instrument Type: IC

Boron as boric acid is used to control the nuclear reaction in pressurized water reactors because of its strong neutron-absorbing characteristics. To prevent corrosion, anionic contamination is monitored. Here sub-ppb concentrations of inorganic anions in a large volume sample are determined in borated waters using matrix elimination through the use of a CR-CTC trap column. The anions were collected on a concentrator column, eluted and determined using an electrolytically generated hydroxide gradient on IonPac AS15 column. This is an improvement over using borated eluents (AN166).