PURPOSE OF WATER TREATMENTDOE-HDBK-1015/2-93Principles of Water TreatmentCH-04Rev. 0Page 2There are several processes used in reactor facilities to purify the water in the systems andwater used as makeup. Deaeration is used to strip dissolved gases, filtration is effective in theremoval of insoluble solid impurities, and ion exchange removes undesirable ions and replacesthem with acceptable ions. Typical ionized impurities found in water are shown in Table 1.TABLE 1Typical Ionized Impurities in WaterCationsAnionsCaNO++3-MgOH++-NaSO+4--KCl+-AlHCO+++3-FeHSiO++3-CuHCrO++3-SummaryThe important information in this chapter is summarized below.Purpose of Water Treatment SummaryThere are three general reasons to treat water for its impurities:1.To minimize corrosion, which is enhanced by impurities2.To minimize radiation levels in the reactor facility 3.To minimize fouling of heat transfer surfaces
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