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Manually initiated automatic regeneration control systems are <br /> provided for individual regeneration of each exchanger. The <br /> control system is also capable of manually initiated automatic <br /> series regeneration of the primary and secondary anion exchangers. <br /> Series regeneration is the process of passing the regenerant <br /> chemical downflow through the secondary exchanger first, then <br /> downflow through the primary exchanger. <br /> Under normal operating circumstances when both the cation and <br /> anion exchangers require regeneration, the exchangers can be <br /> regenerated concurrently. This process requires automatic staggering <br /> of the various regeneration steps and results in a time savings <br /> for the regeneration process. <br /> In the event of failure of the programmable controller to direct <br /> system operation, complete manual operation is possible. <br /> o Sampling And Analysis Capabilities. Human monitoring of the <br /> system operation is also important. Adequate sample ports are <br /> included to allow for collection of sufficient samples to monitor <br /> the performance of the system. Sample lines from each of the <br /> following sample ports are run to a central sample collection <br /> sink in the Water Treatment Building: <br /> o Primary Anion Inlet <br /> o Primary Anion Outlet <br /> o Secondary Anion Inlet <br /> o Secondary Anion Outlet <br /> o Cation Inlet <br /> o Cation Outlet <br /> o System Effluent <br /> o Dilute Acid <br /> o Dilute Caustic <br /> Sample ports are also provided at each of the two neutralization <br /> tanks. <br /> S6 7 <br /> HII <br />