CW (Circulating Water)

Question 1

Unit experiences a loss of all Turbine Cooling water. What effect if any does this have on the Circulating Water (CW) System.

A. CW pumps will lose seal water flow
B. CW pump bearings will overheat
C. Lose the ability to add chemicals to the Circulating Water canals
D. This loss has no effect on Circulating Water

Answer 1

B. CW pump bearings will overheat

Question 2

Operators have determined the ‘A’ Circulating Water (CW) pump needs to be stopped immediately. Where can this be accomplished?

A. In the Control Room ONLY
B. At the Breaker ONLY
C. EITHER in the Control Room or at the Breaker
D. The pumps do not have the ability to be tripped immediately

Answer 2

C. EITHER in the Control Room or at the Breaker

Question 3

Unit is at 100% Power
Circulating Water is in a normal lineup with CWN-HV11 in Auto
Describe what happens if the operator takes ‘C’ CW pump to stop

A. ‘C’ pump discharge valve will start to go closed. At 8% open the pump will stop
B. The ‘C’ pump will stop and its discharge valve will go to 44% open.
C. The discharge valve will stay open, after 3 minutes the ‘C’ pump will stop
D. After the pump stops, HV-11 will go closed and ‘D’ pumps discharge will go to 44% open

Answer 3

A. ‘C’ pump discharge valve will start to go closed. At 8% Open the pump will STOP.

Question 4

To start a Circulating Water (CW) pump the discharge valve must be ____ and the water box outlet valve must be ____.

A. Open, Open
B. Open, Closed
C. Closed, Closed
D. Closed, Open

Answer 4

D. Closed, Open

Question 5

An attempt to start a Circulating Water Pump has been made
The pump failed to start
Which of the following conditions would have prevented the pump from starting?
The Circulating Water…

A. Intake Canal Level is too low
B. Pump’s discharge valve is closed
C. Loop’s condenser outlet valve is closed
D. Loop’s cross-tie valve, CW-HV-11, is closed

Answer 5

C. Loop’s Condenser outlet valve is closed