Condensate Polishing

Question 1

State CPS flow path when in DEMIN mode

Answer 1

Flow from all three hotwells goes to CPS-P-401 and then the demins and back to all 3 condensers

Question 2

State CPS flow path when in POLISH mode

Answer 2

Flow from the “dirty” condenser goes to CPS-P-401 and then the demins and back to the 2 “clean” hotwells.
The “dirty” hotwell is isolated from the Condensate pumps.

Question 3

State what causes the CPS demin bypass valve to open

Answer 3

Cation or Mixed bed high DP - 60#
Total Demin bed high DP - 95#
Cation inlet bed high DP - 125F

Question 4

State what causes CPS-P-401 to trip

Answer 4

Undervoltage
Overcurrent
Low flow of 1000GPM for 30 sec
Low hotwell level of -9"
high discharge pressure 150# for 3 sec
E-stop from PLC or DCS