EFFECTS OF RADIATIONDOE-HDBK-1015/2-93Reactor Water ChemistryON WATER CHEMISTRY (SYNTHESIS)CH-03Rev. 0Page 8Figure 1 Change in pH, Gas Concentration, and Nitrogen Compounds With Excess Oxygen AddedNormally, the amount of hydrogen maintained in the reactor coolant, in conjunction with otherprecautions employed, greatly reduces the probability that the amount of oxygen entering thecoolant will be sufficient to lead to Reaction (3-16). If a large amount of air were accidentallyadded to the reactor coolant, one solution would be to add more hydrogen. The added hydrogenwould react with remaining oxygen, disrupting the equilibrium of Reaction (3-16) causing thereverse step of that reaction to occur. When all the oxygen has been removed, H and N could22react by Reaction (3-14) and help reestablish a basic pH. The relationship between thesereactions and pH following the initial oxygen addition, and a subsequent hydrogen addition, isillustrated in Figure 1.
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