NOTE: A sustained makeup of about 4 gpm is available to the primary purification system by using two block orifices in the makeup line; however water requirements in other areas of the plant (e.g., secondary system, intermediate cooling system, other equipment and systems in the machinery space) may be such that 4 gpm cannot be attained, therefore, the sustained makeup must be limited accordingly.
NOTE: Water from the port feed pump may tend to flash at the chemical feed funnel. Caution should be taken during this operation.
NOTE: Low pH is indicative of high dissolved oxygen content (air exchange), while high pH could possibly be caused by hydrazine residual.
NOTE: An over specification for total solids may be caused by a salt water leak in the intermediate cooler. However, an over specification in chlorides will occur at the same time. IF such a situation exists, determine the source of the leak and repair same.
NOTE: Unless an error is made in the amount of chromate added, there should be no normal reason for chromate to be over the specification. IF an over specification exists, a complete investigation, e.g., plugged lines, etc., should be made to ascertain the reason.
NOTE: Low pH is indicative of high dissolved oxygen content (air leakage), while high pH could possibly be caused by hydrazine residual.
NOTE: Except for carry-over from the boilers, the possible sources of contamination and the corrective actions are the same as those for total solids in 1. above. Action must take place immediately because detectable chlorides in the feedwater will be concentrated and will result in over specification in the boilers in a very short period of time.