Cond Demins (CND)

Question 1

How much Feedwater flow is passed through the Cond Demins?

Answer 1

2/3 of total feedwater flow (1/3 is from 4th stage heater drain pump)

Question 2

What happens to inlet, outlet and transfer valves on a loss of Instrument Air?

Answer 2

1. Inlet and Outlet valves fail As-Is
2. Transfer valves fail closed

Question 3

What cannot be done with a loss of Service Air?

Answer 3

Cannot transfer resin

Question 4

What happens to isolation valves on a loss of power?

Answer 4

Isolation Valves fail As-Is

Question 5

During normal operations, what are the Cond Demin system limitations?

Answer 5

1. D/P: <= 55psid with Max of <=60 psid
2. Flow: <3300 gpm with max not to exceed 3500 gpm
3. Design temperature: 140F

Question 6

When should Cond Demins be removed from service?

Answer 6

System D/P: < 35psid
Flow: <2000gpm

Question 7

What is used for slucing resin?

Answer 7

Condensate and Service Air